So, basically, what Natejas is proposing:

-Verified sellers can sell TC however and wherever they want.
-Everybody else can't sell TC at all.

I agree with it.

Neither current system, nor the one proposed by Natejas really affect impersonators and prevent hijacked tc from being sold.
Maybe, in theory, the current system should work, but on practice most people either don't know that the system exists at all or neglect it because it's inconvenient to use. So:

-scammers aren't hindered at all. They don't care about your rules, they don't care about their accounts, they have nothing to lose. If they want to hijack an account and sell tc from it or just scam somebody in game or discord, they will do it and unknowing people will get scammed. Same about impersonation, scammer takes somebody's name and goes messaging people in Discord, hoping to run into somebody who doesn't know about the system. How does having verified sellers post their deals on forum affect this at all?

-verified sellers have to go through tedious routine and even risk getting banned if they fail to do it precisely how rules say

-buyers are more likely to get scammed, because most deals are offered in game or discord, and only scammers will offer deals like those, because verified sellers will get banned for doing so. And unknowing people are more likely to take such deals, because they're more quick and convenient.
For example: somebody asks me to sell them tc, but I don't have my thread open, so I can't do it right now and tell them to wait. If they don't want to wait, they'll try to find somebody who can sell them tc immediately and thus risk running into a scammer.

What will removing this requirement of having to post every deal on forum do:

-Make it much more convenient for sellers and their clients.

-Decrease the probability of unknowing people running into scammers, because now quick and convenient deals will be offered by verified sellers too.

In conclusion, I want to say that people themselves should be responsible for using their money on the internet. Staff should not take responsibility for people being stupid and getting scammed. Warning people of scammers is a good idea. But people should be free to decide whether they want to risk it and trust the person they're dealing with, or they want safety. In case they want safety, they should be able to go on forum and make a deal, but it shouldn't be obligatory. Their money - their responsibility.