The problem is currently that if someone deletes your comment you AP goes down. This I think is a silly idea because people like to keep their player chat clean.
Well you see now a days most people go to other people's account page to leave comments or add them, they are actually just spamming things like "hi", "add me" and things like that and they are gainning AP. Personaly i don't mind about them leaving comments behind but i will delete those people's comments if they are actually spamming to get AP.
This happens for a reason. If a comment is deleted for SPAM, the user should not get those points. It makes it unfair for the users that get their points legitimately and fair, and gives an advantage to spammers. That is why we have it set up so if a comment is deleted, the points are lost.
People just need to learn not to get so attached to their specific point values.
What he means is he does not like keeping comments on his profile so he knows when he gest new comments but then he realised that you lost points from it.