I block all non contacts on my cell phone and once a month or so go back through and delete them all. When it leaves a voicemail, that's what ticks me off. I swear before I blocked them, I'd get 10 calls a day.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram