Wait, how did you know they were bots? They all wore very similar gear ( mithril sq shield, addy pickaxe, glory, mithril platelegs, nature tiara), they all were skulled, they all were level 95, they all had spirit graahks summoned, and they all had names similar to 'tuhfginkj'. Either a very elaborate joke which wasn't very funny, or they were bots who logged in and out again.