What will that achieve? After mixing you end up with addresses that contain coins that are partially stolen, partially clean (tainted). You could, theoreticall

What will that achieve? After mixing you end up with addresses that contain coins that are partially stolen, partially clean (tainted). You could, theoretically, convince some providers of goods/services not to accept any tainted coins. It is doable, but most business owners don't care about that, as long as the money is not pure stolen (in both Bitcoin and physical world). Consider that some money in your bank account has previously gone through being stolen, traded for drugs, guns, slaves, being laundered. Pretty much nobody but the Central Banks has clean money.