As long as the moderators aren't doing anything, plenty of users, especially newbies who don't know how to identify red flags for scams, will continue to be scammed.
If scamming wasn't so unbelievably rampant in the marketplace section, I'd consider donating bitcoin to this forum, but I can't do that if the moderators are not doing their jobs.
It's not their job (in case you didn't know):19. Possible (or real) scams and Trust ratings are not moderated (to prevent moderation abuse).
leave negative trust on their bitcointalk profile, post a formal scam accusation, and report them to the moderators.
Users feedback won't be shown (to the public) by default on someone else's profile, unless their DT1/2 members, so they have to open a thread in Scam Accusations section instead and wait for DT1/2 members to leave the appropriate feedback and rating. As mentioned above, reporting such cases to moderators won't change anything. 