This.

[Jaron]

Obviously his political career as local president of the Gentleman's Cyclists Club is taking off and he can't have these damn old posts haunting him.

[Neil]

I wonder if he would have done this on the old forum where he had thousands of posts

I would have removed his editing and deletion rights, Dorsey-style.

These electrons are mine.

[Agelastus]

I hope he doesn't erase the rest of this old posts. 

He's done it with all his posts.  If you look up "Posts by User" in his profile they're all smilies.

As a historian I take his tampering with historical evidence personally.

May he never cross paths with my electrons again.