On EAB members are banned for serious infraction(s) of the EAB rules, it really is that simple.
No it's not - no at all, it's enough to just be repetitive.
I did nothing serious to get banned, not at all. Once the "troll stamp" has been cast on you, it is used as excuse for just about anything - "Oh he is just a troll". It was written by certain people (who are not banned btw) that I've been using multiple accounts (untrue), that I was already banned on multiple forums already (untrue at the time), that I have psychologial issues (huh, 'cause everyone's a shrink? No, not at all) and more personal attack nonsense.
There is a tendency in this community that people fall into "camps", where certain "teams" and their "leaders" are glorified beyond what is healthy. It's not unique to Amiga, but this community is so tiny that this social concept is almost purified without much of the complexity found elsewhere. When an alpha-nerd says "troll", the geek followers ("minions") are only happy to act as a mob, across multiple forums and whatever. But it doesn't work in the long run, the world is larger than these bubbles, and technical problems don't vanish just because you get rid of the "trolls" that have been pointing them out. And sometimes alpha-nerds just pull the plug and sign off, leaving the "minions" in confusion, and the projects are left in disarray.