Buzz, you have too much faith in cops
I have faith in engineering.
There is a tendency in threads such as these to impute to the bad guys special powers and or to equip them with all the tools necessary to do anything they want.
Don't you folks realize that people have been working for thousands of years to develop doors that can resist just the kinds of attacks you describe.
Google security doors. There are doors that you could attack with a sledge hammer all day long without breaking through.
"Oh wait..what if the bad guy has a bulldozer". Geez