As stated, it depends whether or not the members go on the forum - but then again, those who do might carry out the 'messages' so to speak, with a chain-reaction type effect.
But I know for a fact that it affects me:
Really obscure example:
There was this thread, up AGES ago, that was an observation on how, when a random walks into the territory the pack/pride/clan members will either:
1. Stare suspiciously/get agressive.
2. Become frightened and hide.
3. Bounce up and say hi in a really overly-cheery voice.
For some reason, this stuck in my brain, and I began to view the 'default' reactions as sort of 'lesser' and n00bish. (They really aren't though, that's the funny thing.) So, when above situation happens, I always do something weird so as to avoid the stereotype.
~Random bit of trivia over~