I really want guests to be comfortable to talk and say what they want. The clean feed is mainly an accomodation for people who want to listen to the podcast at work or on car trips with kids in the car who don't want to have to be careful.
If it means some content will not be available, that just the way it goes. I can't keep everyone happy, but I'm willing to give a little here and there.
I'm a sad, sad man :( Aren't you glad I'm not your dad :)
As for headphones at work, that's what I do. I do know that some like to play stuff for the techs around them, but it's the managers who have a hissy fit if someone drops an f-bomb or a crude joke. Personally I wouldn't want to work at such a place, but there are more oppressive, bureaucratic work environments out there than there are cool places like 37signals.
1. Kids will inevitably learn every curse word.
2. Doing so won't bring them any harm at all.
When I have you back on as a guest, feel free to say whatever you want, however you want :) I'd rather you be yourself than what someone else thinks you should be.
Good controversy advances the state of the art. Bad controversy doesn't. Lately I've been trying to be more purposeful about the type of controversy I personally get involved in.