When SR 1.0 was still around everything was fine. Very few people used the other markets at that time, so every vendor was on Silkroad. You didn't have to worry about imposters, just about about being scammed if you were so stupid as to FE.
Now after several busts and shutdowns (be it from LE or the owners themselves), I feel like the online drug business has mostly come to a standstill. There's no main market around, everyone is wondering where to migrate to in order to get drugs, and the scene has naturally become very distrustful of everything new.
With TorMarket and SheepMarketplace gone, there was only SR2.0, BMR and TheMarketplace left. Now that BMR is shutting down and basically no one using TheMarketplace (probably due to i2p), SR2.0 is the only market left. As soon as they get busted (and according to some this has already happened or is likely to happen in the near future), FBI will have achieved what they wanted.
I have to disagree. As long as you can safely buy drugs with the click of a button while sitting naked in your recliner, these markets will be around.
The idea is out there, it has been tested and proven to work. That can't be taken back. Someone will always be around to deal honestly. Its just another nail in the coffin of prohibition.
Sure it seems bad now, but I'm sure people in the 20's felt the same way when their favorite Speakeasy's were shut down. But more popped up and more people got involved, security got better and eventually prohibition of alcohol was repealed.