So are you suggesting that using an emotion when making a decision is a bad thing? haha
When it interferes with one's ability to fully think through the details and consequences of that decision? Absolutely.
(And I don't mean that snarkily, so don't take offense.)
I get that people are hurt. And as much as I would love to quote Tombo here and say, "Life is hard, this isn't a safe space, etc", I do genuinely feel bad for that whole debacle, and the people involved. I've been a collector since 1991, and I know how much money he/they made off with. I get that, and it was horrible.
And as others have already beat me to, I'm sure it feels good to say 'screw that guy and his parts', and not want them here. That's fine.
And in no way am I trying to justify this member's behavior, or argue that he's a good guy, or I've been to his house, etc. But whatever parts he's unloading these days, he appears to be selling outright. Either he's given up trying to scam, or enough people have been successfully made aware that he just hasn't been able to be successful at it. Either way, I'm not aware of anyone having been scammed in recent history, and I think that's an important piece of info (and even more important if that's actually not true, in which case, someone please speak up, with details). It all comes back to my original question of 'what problem are you trying to solve' with a ban. (Which I don't think anyone has ever really answered, but it's moot now.)
However it's the practical aspect of what is basically an unenforceable ban that is of bigger concern. Are you seriously going to harass every person who tries to sell any item on the list of 'contraband' items, requiring them to somehow 'prove' that they are original, and not RAM?
We already have KLOV Price Police, which already deters many people from selling here. The last thing we need on top of that is a KLOV Gestapo, asking 'papers please' to innocent folks who have nothing to do with things that happened in the past, and just want to restore their games and be part of the ecosystem here.