Who knows what the government is going to go after and with what amount of resources? It seems as though all things crypto are under the microscope at the moment but that could change. I do hope there are some powerful bitcoiners with political influence lobbying for us, because the little guys like myself can't really do much of anything to sway those politicians looking to criminalize mixers and whatever else.
Though this is my personal observation, the government is doing all these to destroy Bitcoin since they could not destroy it directly so they have to enter it from the window to destroy everything, Andy they are attacking any company that connected to Bitcoin activities therefore those who are using those services should be careful with the kind activities you share. But question the op asked it looks like futuristic. CM is down z Sinbad is down now which one is the next one to shutdown? It is a very simple question, and it needs a simple answer.
Any mixer that deviate from the mixing rules to do it own things and likeness will be shutdown. Because as a mixer you have to obey the rules set out for you to operate.