Any brick-and-mortar shop that accepts cash and charges a lot for labor can be u...

Any brick-and-mortar shop that accepts cash and charges a lot for labor can be used for money-laundering, but that doesn't make it illegal.

An online business is actually less useful for laundering than the brick-and-mortar shop, since you don't have cash payments.

Brick-and-mortar shops don't have botnets.