Normally I just play games and don’t hang out much on the forums. But this is certainly reaction-inducing.
Let me just try to summarise and check, as there are some elements that I extrapolated from the conversation and that were not explicit (somebody corrects me if/where I’m wrong).
A presumably long-time user, if we take it that the number of posts correlates well with time spent on Happy Meeple, does the (once ?) usual thing to keep the chat nice and healthy while the admins are not there. Alex B. clearly wasn’t forced to do it, but he(?) chose to do it, to be nice.
Then a presumably less experienced user endowed with moderation powers gives him a ban with no warning nor explanation.
And when Alex asks for an explanation, the same admin issues a reply that is condescending, borderline insulting and completely misses the points, i.e. that Alex’s action was both well-meaning and in line with site policy.
Finally, a senior admin intervenes and it appears the junior admin was given power to do things that potentially cannot be undone ? (A weird concept to me, when it comes to a computer-related thing like a website account. Surely, the person who coded this website can always open the bonnet and manually change a variable, no ? I’m no programmer, so I don't know, but it sounds weird to me.)
This is a poor level of community management and moderation. I wholly second the messages of Brian S. and Marlene H. above.