I feel the telemarketers have the right to do what they do, as long as they don't engage in threatening people, of course. Some people must talk to them and buy from them, or they wouldn't stay in business.
But I personally have no interest, and value my privacy, so I feel my solution is good for me and I don't need to yell at some poor person doing a job.
I personally don't mind junk regular mail, that I can peruse or throw away at my leisure.
Most junk mail have a postage paid envelope with it I put anothers junk mail in it a send it off. Dont have anything to put in them send leaves or gum wrappers whatever.