Outch, seem we have a new MtGox. But it is peoples own fault if they use service in the Deep Web. There are so many scammers who try to take your money out of the pocket.
You could use that same senseless argument against any business.
Why not go the whole hog and argue against the very basic human requirement of trust? Why should any two humans trust each other when there's a chance that one might mistreat the other?