How many people do you know that download movies and smoke weed. By your logic your as guilty as they are since you didn't report the crime.
I don't believe staff knew of any doings that were illegal. It's likely they did not know as Paul Vernon was a recluse. Suspicion is far different from knowledge.
If and that's a big if the staff knew activities were illegal I hope they would have spoken up. It's likely the majority are just as confused as you and I to the truth of the matter. As far as I was aware Big Vern was the only one with access to the Bitcoin wallets through layers of security protocol. This gives me the most suspicion that the original crime was not quite as it seems.
The difference is I didn't help them get the weed or the movies. If you work for a company and it is having withdrawal problems like cryptsy did for months, you would start really asking questions. Since many of the staff apparently had access to ask vern himself I don't see how they would not have been given an answer for so long.
In any event, we will all have to wait till the feds recover every e-mail send to / from the employees before we really know. Till then I guess we can all believe what we want.