"An honest mixer"

Surely an oxymoron.
Can't think of any reason other than illegal that would require coins to be mixed. But am prepared to be educated otherwise.
And there are tons of "free" mixers, altcoin exchangers , gambling sites, you can deposit there and withdraw, even better you can buy altcoin and sell it in other exchange, if you do this with amounts of 1 btc or less do you think the exchange will bring personal data outside only because someone claimed those bitcoins are theirs?
You can deposit the btcs in the ripple network and withdraw them. Creativity im not lacking.
And this are not ideas for hackers, but to protect our privacy.
Ontopic, in any case this hacker needs punishment, with a forensic investigation he surely left behind some trail.