I sent a letter to Crooklyn once saying not to come to my property ever again, and elders came to my property to discuss it with me. Mind you, I had been out for >10 years at that point. I ordered them away and said don't come back.
I have moved and now they just keep appearing.
I am going to totally deface the tract and enclose it with the letter, either by ripping it up or writing apostate graffiti on it.