DEX asking for KYC?

Haha. this is unbelievable to see a DEX asks for KYC.
Additionally, if users simply tick on non U.S citizen, to surpass the KYC's requirements, what's happened?
Do the CB team check IPs of users' accounts?
KYC on DEX does seriously violate the essential vision of decentralized exchanges.
It's probably only going to be happening more and more...