A very basic security feature, as every scam dev makes new accounts:
Limit the maximum withdrawal issue for those new accounts to 1 BTC per hour..
This way no scammer can scam for more than 1 btc .. which would make them walk away from bittrex at least.
The Dev here scammed for 20 BTC in a matter of minutes.. Its totally freakin' unbelievable that you (bittrex) allow someone to withdraw more than 20k USD (in btc) in a matter of minutes..
In EVERY security/fraud detection system of the world this transactions would raise like ALL the freakin' red flags of the world...
Trivial to circumvent, and in this particular case completely ineffective. The account was created 2014-06-04.
You'll be reporting and providing information to relevant authorities?
Or do you just plan to skate by completely on this scam, like you do with all the others that involve your site?