Why don't you just laugh ... at it and about. The internet is - thank God - a microcosmos of the real world nothing more or less .....

There will always be adults behaving like kids - on the net and in real life.

There is no way just to ... quit. So, when you say you'd "remove yourself and be an occasional lurker" you also say, that you're still interested.

Well then ... why not stand it, ignore it ..... and laugh ?!