You have every right to speak like a knuckle-dragging troglodyte. The PyCon folks also have every right to say for you to do it somewhere other than their private convention space.
And I have no problem with how Linus talks, without concern for self-censorship.
Funny how we owe a large of the success of open source (and most of Linux) to a "knuckle-dragging troglodyte"...
(Another tangential point about Linus and language: he is very good at targeting his profanity. He doesn't drop f-bombs every third sentence, he saves them for when they are most effective. I don't think "knuckle-dragging troglodyte" quite applies.)