What you are asking for is a basic change of attitude for this place and I just don't think that it is going to happen. Better to acknowledge that that attitude exists here and let people decide whether they fit in with it or not.
The attitude might not be great, but neither is the lack of faith. I wish that would return to this place. I truly wonder if that was ever there to begin with. My cynic says, no.
Prim is right. If you find something offensive, say something. Ro is right. If you clam up, you have no right to complain later about no one complaining. Is everyone going to take every sig change request with a "top o' the mornin' to ya" attitude? No, but that isn't an excuse for people to not say something. Then again, this is free speech for you. The right to complain or be racy.
There aren't that many people here with racy sigs, by the way.
Again, I ask.. how many posters do we have who are teachers? This I'm asking because I don't know the answer.
Edit:
Not a single person said anything about it, even though I know that many felt that it was inappropriate.
Maybe we should persuade these "many" to learn how to speak up. Like Prim said, no one should feel obliged to be silent. Who's fault is it if someone doesn't speak up? (Not rhetorical.)
The many reminds me of the unnamed White House aide. I always look at it with a skeptical eye. Mostly because I have my doubts that people are meeting in secret to discuss something like an offensive thread. Although, far be it for me to tell people how to spend their time.