That's how law works nowadays. Make most things illegal, but don't prosecute so no one worries about having so many laws. But then when you want to place someone behind bars you can cherry pick any law you like.
"Show me a man, and I will show you what he is guilty off" - old communist saying.
Hi i think you refer to this : "If you give me six lines written by the hand of the most honest of men, I will find something in them which will hang him." and is attributed (disputed) to Cardinal Richelieu , not a communist precisely. By the way i completely agree with what you are saying , that's the tactic and is been used in a lot of places around the world.
"Show me a man, and I will show you what he is guilty off" - old communist saying.