There are only a certain few that I'll let clean my ducts and tell them that :D
I keep my land line for a number to give ALL businesses including doctors etc and when dealing with anything on the internet. At a minimum, I get 5 junk calls a day on it while my cell phone stays nearly free of them. Yeah, it's costing me but imo, it's worth it. A couple of years ago a girl friend listed my cell number when she entered my name to win a freakin Ford pickup. Told her in no certain words that she's not to ever give out my cell # for ANY reason!