No one listens to me anyway Evo!
I can tell you that as far as I know there hasn't been a controlled (explosive) demolition in Australia since the Canberra fiasco some 5 years ago where from memory there was a death with the debris blasting 400 odd metres from the demo site. In Melbourne the last one was 15 years ago of the old St Henry's (i think it was a redundant hospital). I think the Unions may have banned them out right in Victoria after Canberra.
The point being that to undertake a controlled demolition there is much red tape to go through, many approvals from a multitude of bodies required and it is a specialist field with the chances of it being done covertly basically zero.
Also, even with a controlled demolition, the building must be completely stripped internally, even before the planting of the explosive devices which must be placed strategically with the authority of structural engineers. As Canberra showed, it is inherently risky work with outcomes beyond expectation and explanation of the experts, pre and post explosion. I have have had debris fall on my car when I was advised that I was safe distance from non explosive demolition works which were supposedly bread and butter work for the contractors.
So in summary, demolition works, and by extension explosive demolition works would be one of the last methods of trying to inflict damage on a group of people as the outcomes have too many variables and are unknown; the works are simply too risky in trying to achieve an end result.
I think some believe it is like the movies where they whack a stick of red dymanite somewhere on a wall and someone unrolls a spool of demolition wire and pushes down on a handle like the Coyote; or think perhaps it is as easy as the Joker makes it look in the Dark Knight.