seriously tho, what legit reason do you need a mixer for if its not to "illegally" hide the origin of the bitcoin you are mixing?
whether it was obtained legally or not, the act of hiding it is illegal.
Imagine if the conventional banking world introduced a system that ran along the same lines as Bitcoin. Every time you bought a barbed wire dildo the place you bought it from would be able to see how much money you had, where else you spent it and what you spend in future.
It would take about ten minutes for the nearest banker to be dangling from a lamp post.
Wanting to keep your business to yourself is a perfectly sensible and necessary desire.