I agree that's not perfect use of trust system. We simply don't have alternative effective ways how to deal with users who promote scams.
Scams are not moderated by the forum and unfortunately even if it's clear scams like Yobit and 1xBit. It's sad that our hands are not free.
On the other hand I do not think they care about the tag so sending out red tags do not do any change. Perhaps other campaign could count it but we always have choice of leaving what type of feedback we want to send.
I'm not even sure if their "honest" review campaign is still running.
It was a good joke after all.