I just wanted to let you know about an update that Shpigford pushed live today. You can now disable commenting on your profile walls. So if you are going away for a while, you can disable commenting so your profile doesn't get spammed away.
This update could contradict itself. If it hides the comments from other players, then you could make two accounts, have your second one disable comments, and your account could spam away and rack up hundreds of AP in minutes. (I hope I'm not inspiring some spammer who would try this.)