I agree, i have seen twestern(sp?) warn people for things like saying bad things about an article which is just stupid.
DKII has been banning people for any anti-wii comment. I love my Wii but some of the comments were not evn bad yet he went on a fanboy tirade and banned people.
I think the thread you're talking about is one where the user didn't post the whole article so that it looked pretty horrible rather than when you read the whole article it made sense (the one about Valve not a PS3 developer). The warning was for a needless insult on Gabe that really wasn't nice at all.
As for the locking, I totally agree there should be a comment before the lock.