We don't have our own blacklist. Atomex take all information about it from public and private sources. I can't write more info about it here.
The thing is, different exchanges block coins for different reasons. Some don't want to be involved in helping fraudsters or hackers liquidate their ill-gotten gains and I don't think there's anything wrong in that, but others can ban your account if there aren't enough hops between your coins from your tx and a provably fair gambling website.