We look at the result, true - the address in the blacklist, fals- clean. If the address is in the black list, then the USDT on it is frozen and it is no longer possible to send them anywhere.
Tether ( https://tether.to/ ) may block your USDT at any time.
Wow, right?
And no one will explain to you the reasons for blocking
Well, tether is likely not a decentralized cryptocurrency otherwise censorship wouldn't be possible without community or public participation.
A truely decentralized cryptocurrency may only allow censorship if a transaction has been publicly proven to dangerous/immoral. It has to be done publicly rather than in secret, and the reason for the censorship clearly stated and visible to the public. Besides, there has to be list of rules that guides this to prevent abuse.
I'm not sure we have truely decentralized cryptocurrency that censors transactions the right way yet, otherwise no one will complain too much because it will fair