I’m with @Darth_Algar and I don’t have a problem with telemarketers. I am always friendly and don’t fault people for making a living or moonlighting in the industry. It’s a job, it’s not “personal” when you get these calls and just like the internet, there is a real person on the other end that deserves to be treated politely. My daughter worked in a call center taking political surveys that were commissioned by the state of CA. for a few years when she was a teen. It’s a crappy job, but it is a job and it is also a viable marketing tool.
I say get over it, and either don’t answer or simply say ” I’m not interested but thank you anyway, have a nice day.” Such a first world non-problem. You control your phone, take control if it bothers you that much, just don’t answer and let the calls go through to VM. I think this scapegoating of telemarketers is a nice psychological defense like being a troll on the internet, a way to project your own frustrations onto others. Just fucking don’t answer, simple.