Hmm, well, I do not know how you can ban coins like Monero. Okay, recently these coins were delisted from popular exchanges, however, there are a number of anonymous exchanges where you can buy it.
Well, it's the government and exchanges will be disallowing for their listing while those exchanges that are complaint to the government will just halt its trade and will delist it.
It's true that there are still exchanges where it is still listed and the government can't do nothing with it, they can command certain exchanges to have it delisted but they can't dictate it to all.