What I draw the line at: people who conceal their identity.

I can relate to people with any shade of opinion but I cannot deal with that level of paranoic mistrust.

On this thread that means "gnu", who has said he or she will never reveal who they are. Given that, I can't imagine how it's ever managed to meet anybody else here in real life, but if it comes across me in a public place, just go away, please. You can assume that if you do introduce yourself, I will tell everybody I know how to identify you. I will not be complicit in that kind of secretiveness.