No. I don't agree with your suggestions.
I believe the merit system is in play, and it's hot af.
While it's true that most scammers and balh blah were ported over from the old bitcointalk system, that's fine. At least the merit system and new activity system cuts off the influx of NEW scammers and NEW scammer accounts.
The old scammer accounts will be weeded out eventually, and it's already happening. Slowly, they'll gain negative trust and get banned too. When that happens, old scammer accounts will slowly die out. And there won't be new scammer accounts to replace them.