Have you ever read their Legal sections with all subtle meaning that involve using their service?
I mean when you use bitcoin you're accepting "mathematical" rules.
With tether you're using a service with all legal aspect linked to that.
I suggest every time to take a look about their condition of usage, here I made some example.
https://bitcointalk.org/index.php?topic=5258508.msg54702459#msg54702459I don't trust a service that can seize my money at their solely discretion or because I have make a deal "with a suspect". In case of issue, I should make a lawsuit? It will worth?
In practice they can refuse to do business with you, but can't freeze tokens on ether or bitcoin/omni blockchain.
If you own the privkey, you can trade the token on any exchange.
Actually they can freeze individual USDT through a hardfork of the underlying coin or protocol. Omni made a hardfork once when 30 million Tethers got stolen,
that's where the "Quarantined USDT" on their transparency page come from. But it's not a threat to the average user.