Funny, I think Linus is a great example for the opposite reason. He shows that if you stop tolerating bad behavior, people will often change how they behave.

The idea that removing vulgarity will increase ambiguity in this context is very strange. In terms of communication, the only use for vulgarity is to convey emotion. That's not relevant here. If we ban it, maybe people will explain why something is shit, instead of just saying it's shit. Forcing other words to take up the slack is a feature, not a bug.

I know about the fast inverse square root code. I could probably give a decent if somewhat vague overview of how it works from memory. I don't recall the WTF comment, and that certainly isn't why I heard about it.

This is a great example of what I'm saying. Commenting 0x5f3759df "what the fuck?" isn't useful. It tells me the author was confused or amazed or something. Imagine if instead they had commented, "Compute an initial guess by negating and halving the exponent. 0x5f3759df was found by experimenting and seems to give a good guess in the mantissa bits."