I just banned james1726354 for using an X-Ray cheat. I have the following logfile entries of diamonds being mined. I went “on-site” and saw clearly targeted tunneling to the locations. There were other incidents in the logfile similar to this one. If you want to know how this works, please read the plugin description.
Spoiler
[Wed May 09 09:08:33 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1269, y= 11, z= -558, l=-1)
[Wed May 09 09:08:38 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1269, y= 10, z= -558, l=-1)
[Wed May 09 09:08:43 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1270, y= 10, z= -558, l=-1)
[Wed May 09 09:08:48 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1270, y= 9, z= -559, l=-1)
[Wed May 09 09:08:53 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1270, y= 8, z= -559, l=-1)
[Wed May 09 09:11:33 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1121, y= 13, z= -488, l=-1) [t= 163sec / (d=165 / b= 19) = r=18.8] [flagged x1; ratio]
[Wed May 09 09:11:43 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1121, y= 12, z= -489, l=-1)
[Wed May 09 09:11:53 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1120, y= 12, z= -489, l=-1)
[Wed May 09 09:13:08 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 9, z= -505, l=-1) [t= 75sec / (d= 35 / b= 33) = r=70.7] [flagged x2; ratio]
[Wed May 09 09:13:08 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1150, y= 9, z= -505, l=-1)
[Wed May 09 09:13:18 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1150, y= 9, z= -504, l=-1)
[Wed May 09 09:13:18 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1150, y= 8, z= -505, l=-1)
[Wed May 09 09:13:18 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1150, y= 8, z= -504, l=-1)
[Wed May 09 09:13:23 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 9, z= -504, l=-1)
[Wed May 09 09:13:23 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 8, z= -504, l=-1)
[Wed May 09 09:13:23 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 8, z= -505, l=-1)
[Wed May 09 09:17:29 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1103, y= 11, z= -428, l=-1) [t= 246sec / (d= 91 / b= 27) = r=73.2] [flagged x3; ratio]
[Wed May 09 09:17:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1104, y= 11, z= -428, l=-1)
[Wed May 09 09:17:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1103, y= 12, z= -429, l=-1)
[Wed May 09 09:17:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1103, y= 11, z= -429, l=-1)
[Wed May 09 09:18:54 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1116, y= 6, z= -434, l=-1) [t= 75sec / (d= 15 / b= 49) = r=248.3] [flagged x4; ratio] [cave]
[Wed May 09 09:18:59 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1117, y= 7, z= -434, l=-1)
[Wed May 09 09:18:59 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1117, y= 6, z= -434, l=-1)
[Wed May 09 09:19:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1117, y= 6, z= -435, l=-1)
[Wed May 09 09:19:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1116, y= 6, z= -435, l=-1)
[Wed May 09 09:19:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1116, y= 5, z= -435, l=-1)
[Wed May 09 09:19:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1111, y= 5, z= -423, l=-1) [t= 28sec / (d= 13 / b= 12) = r=25.8] [flagged x5; ratio]
[Wed May 09 09:19:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1111, y= 4, z= -423, l=-1)
[Wed May 09 09:19:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1112, y= 5, z= -422, l=-1)
[Wed May 09 09:19:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1112, y= 4, z= -422, l=-1)
[Wed May 09 09:22:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1128, y= 7, z= -451, l=-1) [t= 171sec / (d= 33 / b= 35) = r=180.0] [flagged x6; ratio]
[Wed May 09 09:22:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1127, y= 7, z= -451, l=-1)
[Wed May 09 09:22:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1127, y= 6, z= -451, l=-1)
[Wed May 09 09:22:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1127, y= 7, z= -450, l=-1)
[Wed May 09 09:22:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1128, y= 7, z= -450, l=-1)
[Wed May 09 09:22:44 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1128, y= 8, z= -450, l=-1)
[Wed May 09 09:23:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1100, y= 5, z= -448, l=-1) [t= 49sec / (d= 28 / b= 9) = r=15.6] [flagged x7; ratio paranoidDiamonds]
[Wed May 09 09:23:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1100, y= 4, z= -448, l=-1)
[Wed May 09 09:23:49 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1100, y= 4, z= -447, l=-1)
[Wed May 09 09:23:49 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1099, y= 4, z= -447, l=-1)
[Wed May 09 09:23:49 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1099, y= 3, z= -447, l=-1)
[Wed May 09 09:23:54 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1099, y= 4, z= -448, l=-1)
[Wed May 09 09:29:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1147, y= 12, z= -459, l=-1) [t= 311sec / (d= 50 / b= 31) = r=193.2] [flagged x8; ratio] [cave]
[Wed May 09 09:29:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1147, y= 12, z= -460, l=-1)
[Wed May 09 09:29:29 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 10, z= -448, l=-1) [t= 23sec / (d= 13 / b= 5) = r=9.0] [flagged x9; ratio paranoidDiamonds]
[Wed May 09 09:30:04 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1151, y= 8, z= -449, l=-1)
[Wed May 09 09:33:14 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1118, y= 10, z= -470, l=-1) [t= 189sec / (d= 39 / b= 12) = r=57.9] [flagged x10; ratio] [cave]
[Wed May 09 09:33:19 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1118, y= 9, z= -470, l=-1)
[Wed May 09 09:39:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1215, y= 10, z= -562, l=-1) [t= 376sec / (d=134 / b= 12) = r=33.7] [flagged x11; ratio]
[Wed May 09 09:39:34 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1214, y= 10, z= -562, l=-1)
[Wed May 09 09:39:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1214, y= 9, z= -561, l=-1)
[Wed May 09 09:39:39 HKT 2012] DIAMOND_ORE broken by james1726354 at (x= 1215, y= 9, z= -561, l=-1)