Well, not all models have the animation you want. If Animation - Play Unit's attack slam animation doesn't work, i believe it doesn't have it. Unless you get to Critical Strike ability, up at the Art - Animation names, add this "Attack slam". If this doesn't work again, either your unit doesn't have it or i will give you a trigger afterwards. Just pick your unit through Unit Palette and in the left side of the screen, press those arrows above the model to see all of its animations. If there is no "attack slam" animation, then it will of course not work.
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.