Cut and Paste rule is common sense.

Forcing GUESTS to sign on is not acceptable. I was a GUEST here for a while. I won't give my info to a site until I have a chance to see whether I want them to have it. (Yeah, I know - use phony info. And I do when I need to).

Censorship is a slippery slope. First political threads, then Punch the Horse, then horror of horrors Captain Kirk. Combining similar threads makes sense. Removing threatening or obscene attacks - OK by me. I am a little confused - what in the world did Mark say about the weather to have his words censored????
This one has to be thought through carefully and a policy established and published in the FAQ page.