This is a clear overreaction on the moderator's part...
I completely understand the possible paedophilia fear on such forums, and I for one think no one should promote sex between adults and minors, but Gregariddle is clearly innocent and well meaning !
The people involved in the story were watching a (only partly described) film with their clothes on, for a laugh... The fact that they were minors is irrelevant, and frankly the age isn't specified.
In my opinion, this is a legitimate (and legal) depiction of the narrator's youth and background before the story "proper" can begin (with or without sex).
Also, the owners don't seem to frown upon other suspected immoralities, such as drug use by minors and a somewhat "amoral" education in a fictious story... And, as NYCdude pointed out, there's a different standard being applied to different parts of the forums.
I am truly disappointed in this forum, which seems to have, in recent years, veered towards a puritanical, prudish and basely legalese view that fits poorly with a website replete with cock pictures, and mainly discussing the male genitalia.