If you're here, all posts are open to you and all members are your "friends."
I dunno. We have our share of bullies, braggarts, and those who would take umbrage if our line of thought differs from theirs in the slightest.
A couple of years ago a teacher in the UK, I believe, was threatened with dismissal for continuing to use it.
Oddly, most of the later blackboards were actually green in the schools I went to, but noone called them green boards.