Bitcoin from coinjoins, or bitcoin known to be associated with silk road 'type' places?
taint was actually a term about the source of the UTXO. where people can follow each input of a new TX's 'taint' back to the output of the previous old spent tx, to that previous source all the way back to the block reward the coin originated from
more recently the term has become associated with the mindset meaning of dirty coins of criminal activity being painted with a 'red flag' colour/or blacklisted... but taint was an innocent term back in the day, where it was more about accounting/auditing that all coins resolved/originated back to a genuine block coin reward. where every coin has the original definition of taint
Why would a criminal waste all his tainted coins, when he could just clean them by using a Bitcoin mixer?
silly think is.. using mixers is literally LAUNDERING.. so your doing money laundering thinking that you are escaping the red flags of AML/KYC .. but by laundering you are creating the AML flag they seek.
if you are a innocent person with no criminal activity.. dont use mixers.
for 1. you are creating a red flag by using mixers
secondly criminals are trying to get rid of their "dirty" coins by trying to get clean coins from innocent people.
so while you using a mixer your non criminal coins go to a criminal and a criminals coins go to you. now you become the suspect of their criminal act.
..
yea criminals want to pretend innocent people should use mixers.. not because they care about innocent people privacy, but because criminals if only criminals used mixers, the only coins they can mix is with other criminals. so they want 'fresh blood' in the mix to 'steal' clean coins from naive innocent people and palm off the dirty coins to innocent people and get the innocent people in trouble and questioned about how the innocent people are holding dirty coins..
in short. if innocent. just dont use mixers.
if you dont want to look suspicious when walking down the street. you dont do it by hiding behind bushes. you simply walk down a street normally.
even if innocent of any crime, by hiding in bushes trying to not get spotted. you are surely going to get noticed more because now your activity looks suspicious and people will stop an ask what your doing trying to hide behind a bush.
so just dont try hiding and you wont raise red flags