IMHO, we should at least start banning confirmed serial scammers.
This. I don't even get it why aren't these users who are 100% confirmed that they're scammers aren't banned. Their thread is still living though it's locked and trust hidden then using autobuy link.
This seems like a trivial thing to do and isn't really prone to abuse. Moderators could verify the claims via their trust ratings. Those autobuy links tend to be very annoying, yes.
I think we should disable "hide trust" exclusively in Marketplace, Auctions and others that I forgot to mention that involves trades.
Another issue that got my attention yesterday was Beginners & Help. Someone offered people help to claim BTG and asked users to PM them. However, they have been sending users a link to some website that asks them to input their private key(s). Tl;dr to the issue: Trust ratings are not visible in that section.