Yes, because it's an 'organic' thing, therefore each situation is judged on its own merit. You cannot apply rigid rules to these things. It's like holding a conversation with someone in real life: things can naturally go off in tangents.
Like I said before, out with of The Knowledge, which is strictly a resource for information, people are allowed as much as possible to be themselves, within the guidelines of our ethos - and if they step outside of that, that's when you'll see the warnings being issued you're referring to.
Marco.