I've read this thread and others relating to similar complaints. What I have noticed is there was a recent surge in new members(recent as in within a year or so) and in turn some of these brought their normal internet behaviour with them, pushing the envelope here. The rules have always been in place, it's just some people do not/will not read them. I did when I registered and others did too so the recent requirement to "agree" to them just didn't matter to me. Now you can't say "Oh, I didn't know that".
Perhaps the mentioned flight of long term members was caused by the actions of newer members...I know I've been surprised at some of the recent post contents and knew things would be coming to a suprise ending for some, albiet a temporary hiatus.
Someone has mentioned "we are all adults here".....No, that's not true. There are LOTs of folks that have smaller kids at home cruising the site with them and some of the material that gets posted is not appropriate for youngsters.
I for one appreciate the powers at this site for trying to maintain a place to come to related to my Busa and other interesting topics. If people feel the need to push the envelope, just go to the 1000s of other sites where crap is accepted. Everyone knows where they are.....
Have a pleasant day!