To protect your privacy ? If owners of that site got caught
Got caught for what? Accepting bitcoin? There's no regulation that forbids the acceptance of "tainted" coins, because there are no "tainted" coins to begin with.
To protect my privacy is a good way to put it.
I'm glad you agree.
At least let people who use your laundry service knows how dangerous and illegal act they doing don't put it there like it's okay to use the service.
There's nothing dangerous nor illegal to using a mixer. Money laundering being illegal doesn't make mixing illegal.