I purchased some bitcoins from Coinbase and I want to give them away to friends for their birthday this year, but what I'm afraid of is if they end up buying stuff on the dark web with it. Last thing I want to deal with is having to explain to the police it wasn't me. I know there a bunch of mixing services to help protect people from being tracked or traced back to the original account, but which one is has the cheapest fee?
I know the fee pays for the person running the mixing service, but is there such a thing as a decentralized bitcoin mixing service that doesn't take a fee?