I am pretty much going to research anyone I do business with, on and off bitcointalk and see if they are in a WoT anywhere. While it would be nice to display a trust score everywhere, it costs nothing to simply pull up a members profile and read the comments which I would probably do anyway.
Unfortunately most people aren't as thorough, but no amount of restrictions or warnings we put in place are going to stop some people from getting scammed. People really do need to learn to look after their own money and do everything they can to protect themselves, but sometimes it takes getting burned before they realise this sadly.
Youre right, its probably unavoidable being scammed in the community when youre new here. Happened to all old members too already.
You say its already the way i said, but i dont think that the threshold is correct then. Its unlikely that anyone will try to scam in politics subforum, but its likely on many other subforums where trust isnt shown yet. So i think the value that some scammer can speak more freely on the newbie forum is not in a correct relation to the risk that brings to newbies.
Saying that... it could be easily circumvented by using a new account to try scamming people. An old member only would look more trustworthy. Im not sure though how much this is raising the risk.