First, I believe that the appropriate board for this topic is not Reputation, but Service Discussion.
Seems to me that it's going to be a bad day for Sinbad.io and the people that's promoting them with campaign signatures.
Are there any mixers that will get rid of this? By their nature, apart from serving privacy-conscious people, mixers will also attract scammers who want to launder money. Or is there a mixer that is going to reject funds for mixing because they are "tainted"? I don't think so.