I think there should be no AP given for posting on profiles. As u can see if u go to my account, I've got spam left and right. To quote some:
I have no idea who this guy is:
RightwRong says: Posted at 5:15pm on 8/16/2010 hmmmmmmmmmmmmmmmmm im bored
Same goes for this guy:
Brian266 says: Posted at 11:59pm on 8/23/2010 this dude is a lamo-o
This is obvious. And i also have no idea who this is:
gameman22 says: Posted at 3:40pm on 2/9/2010 omg
Now these are just a few of the spammers on my profile alone. I would suggest that u dont award AP for posting on profiles. If u do as i suggest, profiles would have 99% less spam.