Hacks4crack is DOSing markets under BlackBlank request. If you have read all the hacker's post since he appeared over here he makes it very clear in the outlines. The pattern has been alternating from DOSing higher profile markets to lower profile ones., but BB is never under DOS. .
So? If those other markets can't keep themselves running through DOS attempts then they have no real value to this community anyways. There also is no Darknet code of ethics.