The closest I ever got to being banned on TF.N was when I made a post stating that I didn't consider Luke Skywalker and the Shadows of Mindor canon, which sparked off an argument on personal canon and whether or not the term "personal canon" itself was an oxymoron, which culiminated with one of the mods making an implicit threat about how starting a "canon war" could lead to a ban.
In the end I conceded, coming to the conclusion that, yes, the term "personal canon" - if you go with the word "canon"'s strictest meaning - is an oxymoron. So now whenever I post on that forum I tend to use "personal continuity" instead of "canon" whenever I bring up the topic.
Still, that they made such a big scene out of the subject in the first place is ludicrous and an embarrassment.