The anonymous structure of the blockchain technology is a breeding ground for criminal activities life money laundering, drug trafficking?
No, pseudo anonymity of Bitcoin does not encourage criminal activities. The fact that we are dealing with something that has value, gives it more incentive to be used for crime. Do not forget that Cash is more anonymous than Bitcoin. Criminals do not have to be encouraged to use anything of value for crime, they just do.
Bitcoin transactions are traceable on the Blockchain, under certain conditions, which makes using this for criminal activities a very stupid idea.

Indeed. I was going to mention that people always mislead that bitcoin is anonymous one, but its not really, it is pseudo-anonymous as we can still track down who sent how much and from where to where! By using the tree chart one can always trace down to final address. See where it belong, for example if we mapped it to the coinable associate account then we can easily have personal info under jurisdiction action from the coinable itself.
Anyway, I think the only reason criminals are using it is to avoid direct contact of person to person, no cash to be laid and more importantly they can send as much money as they want in the form of bitcoin.