I'm not surprised at all. Eventually almost everyone gets caught (I said almost). They definitely aren't doing enough to keep themselves safe.
Actually the only problem here is that they are getting caught, else it would be helping Bitcoin go mainstream.

I hope bitcoin will go mainstream, but I think
BTC have not been made to go "mainstream" but to be a valid alternative and can
maybe coexist with the actual economic system.
....
This is not about making bitcoin mainstream but using bitcoin as a bad thing. People who are blind about bitcoin will now think that bitcoin is currency for criminal thing. The reason people like to use bitcoin is that it is easier and no question ask when you are doing large value transaction. In my country if you are making transaction which is large enough there will be a lot of question to be ask on what will the money use for
Exactly, but a lot of people are still associating bitcoin
only to bad or better illegal things (as drug, trade of weapons, etc). So yes, it is a problem for bitcoin but the problem is not
BTC itselft but always the people.
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For hundreds of years FIAT dominated these markets and that did not stop people using FIAT in mainstream. So, why on earth, the use of bitcoin in these businesses hinder bitcoin's mainstream growth ? Rather, I think, because of bitcoin's use law enforcement are getting trails of these businesses.
I do not know what should I reply but read above...