Why fear this stupid invention named 'taint'. It is worthless and pointless to think about it. All the bank notes you own have likely been in some sort of illegal activity at some point in the past. Time to burn it all, what if I taint my pockets with illegality!
Because the world is full of double standards, if people not want to follow the regulations, they're criminal.
But if the government take the money from criminals, it's allowed and they're not criminals.The key to know if the coins are no longer considered as
tainted is how far they trace the coins, unfortunately no government or blockchain analysis would want to reveal because they know people will take advantage if they declare to public.