You do know a lot of companies hire hackers who have been charged or found guilty in a court of law to head up security for the company. So where you are quick to judge, they are actually helping you stay safe.
For a security consultant brought in to test a system for weakness, sure. As the person supervising other programmers and writing code with no one looking over his shoulder, and that at one time crossed the line and invaded the computer systems of a company that he had no permission to invade, HELL NO. The same reason police departments shouldn't hire murderers, rapists and robbers. Usually such people will work with the police as paid informants, not police officers. Karpeles was demonstrably a scam artist when he maliciously cheated a French business out of 15,000 EUR and fled the country. This should have been discovered and publicized before MtGox got as big as it got, so only idiots would put money into that scam.
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I also know of two bitcoin companies that have people with charges (not hacking) against them and you probably use them in someway. 
So I would be completely ok with it.
So I would be completely ok with it.If you are implying that these people have drug charges, then the problem is that they would have relationships with criminals in the drugs and money laundering business. At this point in bitcoin's history, with the authorities casting an evil eye towards bitcoin, such employees would be a liability -- a federal prosecutor could find a way to connect the company with criminal activity, seizing and raiding it, thus killing it. i.e. Shrem. You have to be a big bank like HCSB to actually get away with it.