[MichaelGG]

Well a: he could work with LE if he felt this was some strong moral point, and b: LE saying that is definitely lying. There are other services, and there's now more solid ways (e.g. Monero) to hide cryptocurrency. So it's super unlikely it was just his service providing a totally unique thing and without bitmixer.io oh no criminals would just give up and return their sex slaves.

What about people writing secure messaging services? "This terrorist attack would have been prevented if it wasn't for your encryption!"

[Ivoirians]

No one said law enforcement literally went to him and tried to convince him it was a bad idea. And if they did, he still made the decision himself, right? Unless we're subscribing to the theory that he was compelled to shut down.

I would personally refuse to work on a secure messaging service because the thought of making a product that will be used by awful people to do awful things would actually be offputting. If that's less of a concern to you than having secure communication, whatever, go nuts. Not everyone is a gung-ho privacy advocate though.