Ask HN: Entrepreneurs vs. espionage

In my experience organized crime / espionage is the most salient feature of the entrepreneurial landscape. I told someone once that I can't make a grocery list without someone stealing it, intruding into my sleep and asking me how it works. From people hypnotizing key employees to interfering in customer relations, business is war. The police seldom help and often make it worse.

What problems have you encountered and how did you deal with it?