People post because they want to. I have been on forums for very long time. Sometimes, you say your same thing over so many times, you just cant keep repeating yourself. So, you become a sticky of expertise to allow others to read, or you just fade away.. Like Sandi. Poof, gone... But she is in her 70s.. If you feel you are walking on egg shells, you will be notified to let you know. I have asked to be "banned" on one car forum. It was caustic, and I just couldn't keep helping people that were knew and being treated poorly.. So I left. I haven't seen anyone treated poorly here, "I" haven't.. And I am curious as to why you feel the right to know why the mods banned someone? Privacy issues may be at play.
