Try looking at one ability, on object editor check the mana cost if it's 0 or something.. Well if it's 0 then that's why, but if it has a mana cost, then it has something to do with you WE setup..
Finally finding about some of the bots that are flooding the users online - bytespider apparently is a huge offender here - ignores robots.txt and comes in from a ton of different IPs
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.