At least we can still trust assclown6!
But in all seriousness ... I see a significant difference between what the OP is talking about as serious problems and what he is blocking.
Yes - I agree. A group effort to block people who abuse returns, steal, etc. would be great.
But to block everyone just because they ask numerous questions ... or even if they are discourteous ... that is a bit harsh.
I have bought from the OP many times and never had a problem ... but long before I had ever bought from him ... I had heard he was hard to deal with. I ignored that and had fine transactions. Perhaps he and 1 or 2 people I know just didn't get along for whatever reason. It happens. Doesn't mean either one should get an industry ban.
So I'd say ... if you're developing a industry ban list ... let's ban those that REALLY deserve it.
Of course it will never work, because these folks will learn they're banned and just bid under different names ... but it might save a few headaches for a few months.
Cheers,
Patrick