trespassory

My position is that in general, those that are a trespassory, impose costs on the recipient, and reach uninvited into a private forum should be opt-in.

The Volokh Conspiracy » Newsletter Doesn’t Become an “Advertisement” Just Because It Implicitly Promotes the Author’s Professional Expertise 2009

Fifth, they quote William Hundley, "who once said in conversation (but not we guess, to Navasky) that the IRS special agent schools during this period were teaching the techniques of trespassory bugging and wiretapping in formal classes."

RFK's Record Navasky, Victor S. 1972