Heck, I would probably take it even a step further.

I'm trying to remember where the story came from, but I believe it was from an old friend that was an ex-con. Lol, it was either him or Breaking Bad.

He was a meth cook for a while and I believe he said that he had rigged up a lab where if there was ever a raid they had their batch booby trapped to automatically dump into a bath of sulfuric acid. You might want to add that one to your list.

Another one he used to do was take a drive. A long one. Maybe 1.5-2 hours each way. He said he would have someone drive him 2 hours one way and then they would immediately flip around and go the other direction. The whole time, the passenger would be writing down all the license plates of the vehicles around them. Once they would get home they would compile the lists from both directions. Their theory was that there shouldn't be any plates that match going both directions. If there are.... someone's following you.

Tweakers are always paranoid. If I was a dark market kingpin, I would be as paranoid as a tweaker.