Thinking about it, is there ANY fee that would make it worth it to give out bitcoins in exchange for potentially tainted coins that are possibly connected to crime and fraud? Especially given how easy BTC transactions are to track?
Let us talk about the very nature of money. Whether fiat or cryptocurrencies, it both goes around. One is passed on to another and to another and to another. It is possibly endless.
The only difference with crypto and fiat is with fiat, it is usually not written down or documented. No one can possibly know if the money that you just got as a change came from illegal activity.
I do understand the concern of having a suspicious transaction link back to you so I also have not personally used mixers.