Permanent/Temporary Ban on Steam Trade

Steamtrades is a mess at it's given state. Even if you permaban someone, all it takes is to create another account and continue scamming.

Steamtrades should have a new system of mod's to tidy that place up :D, I volunteer XD

ST unmoderated
if someone somewhat ban user on ST he can create another account in minute coz no any basic verification, its heaven of scammers.
Nothing to do with ST, admin dont care and never replied on ST problem, all what is changed we got one more ad on ST :D but make some at least simple soultion... no (at least that stupid $100 verification)

It went pretty downhill after the split and removal of any controls.

Whenever i review reputation on steam, i would see that, there are certain people that should be not be in Steam trade

What do you mean? There's no reputation system on Steam.

Should permanent/temporary ban be given to people that are scammers, trollers, etc.

Are you talking about a Steamtrades ban? What difference will it make? If someone has an overwhelmingly negative reputation on Steamtrades you should read the negative posts and decide if you should trade with that person.

You don't need extra layers of protection and security - you simply need to do exactly what you did. check out their steam profile and make a judgement call. Relying on a third party with lazy mod support to give you a yes/no on whether its safe to trade with someone, is a recipe for disaster. Cant beat your own gut, intuition and common sense to keep yourself safe.

I can recommend to try Barter.vg, am solely trading there, works well and is moderated