If the effect of not censoring yourself in this regard is to work in a much less diverse environment, which side is going to give? Honest question.And a good one, too. The honest answer is: I don't know. I think this is highly contextual. At least I can't make a generalized decision for that. If the "less diversity" bit for instance means incorporating a 'No Nazis'-rule then the choice might be clear while in other cases it might be much more nuanced. As a rule of thumb I am against limiting someone's freedom until there is no other way around it. I would for instance only vote for a 'No Nazis'-rule if there would be a real problem with Nazis without that particular rule.
If, however, we are still talking about the case of censoring out profanity, you know my opinion.
The people who are filtered out (or constitute the "less diversity") are the sort of people who get offended by me making use of a basic freedom (the one of speech). I am not interested in meeting people like that - frankly I hope they stay as far away from me as fucking possible.
This is similar to the reason of why I am against anti-discrimination rules at hacker cons; They are liable to be abused at some point while not providing anything of worth.
The sort of abuse they are supposed to prevent are reason enough to throw someone out even without those rules. Any major abuse is reason enough to get thrown out of a hacker event, or really any event.
The argument I have heard a few times for anti-discrimination rules is that girls get hit on all the time. I was kind of flabbergasted when I first heard this. I mean I can understand that it gets on ones nerves, but kicking someone out of an event because they hit on somebody really is not the right thing to do. If you don't want to get hit on there's a plethora of ways to communicate that in a non-verbal fashion, like wearing a wedding ring or - less subtle - wearing a shirt that says "I don't want to get hit on" or something, you get the idea…
I can use profanity in a peaceful manner to set emphasis and if someone feels attacked, denounced or otherwise mistreated they can just talk to me. Seriously, I don't bite and if I see your point I will act accordingly. Even if you are offended by someones actions that doesn't mean that they are unyielding dogmatic assholes - Just give them the benefit of the doubt and try to reason with them. And if it works you might've just broadened your personal horizon, maybe even made a new friend.
You'd think a community consisting of some of the most intelligent people on this planet would manage to have a proper communication culture, but in many aspects we are clearly lacking. I hope for this to change and of course discussions like this are a great first step towards doing so.