Just tell them rudely to get lost for a while. They'll get the picture. Tell them to stop pestering you, or you will call the police. Then close the door. Easy and done.
I believe that this will probably get you DA'd also.
If you are going for the fade, you have to have as little contact with them as possible and be very gaurded on what you say them. I would go with the depression/health issue excuse.
If you feel bad about telling a lie to these jokers, don't. They will lie to you in a heartbeat while looking you in the eye and shaking your hand.
Heatmiser