Out of those 7 articles, 5 are from Norad.
Out of those 5 articles, 2 have no images whatsoever.
Out of the 3 that do, 2 have either an image of the comic's official logo or a totally SFW image of the main characters.
Only one, at the very most, has a depiction of breasts. Covered by text…
My theory is that, yes, somebody is trying to attack the site, but they might mainly be after Norad. There's a previous case of a guy deleting his review of Least I Could Do in May. He could probably be back and flagging his reviews as well as his user.
I personally never thought his material was that offensive, and I firmly believe the reviews have been unfairly flagged. For the moment, I think the extra warnings should be enough, but if possible, you should inquire Wikidot exactly what reasons were given for the flagging, and how to remove them.