If this is a serious question so you can judge whether stricter moderation is needed, than I fear the only way you'll get a true representation of how the forum feels, is an anonymous vote.
The majority of people that will be offended by his posts, won't want to openly voice that opinion due to the offensive replies and confrontation they will undoubtedly get.
If it is indeed to massage his ego, carry on...
My opinion is, I'm pretty sure that if I met him in person I'd get on with him well, as I get on with most people and have many friends with equally sick and offensive sense of homours. And if I'm honest, in person, I probably need a swear filter myself as would most of you that I've met lol. But in person it's different.
But on here, written down, its just unnecessary and offensive 90% of the time. I wouldn't do it, others don't do it, and I don't think anyone else would get away with it.
But if the mods are happy that that's the impression they want to give of the forum, then that's fine.