I recorded a voice mail suited specifically for telemarketers. It's basically me faking a call and some interest to keep them busy ("Hello, yes... yes... ah-a..

I recorded a voice mail suited specifically for telemarketers. It's basically me faking a call and some interest to keep them busy ("Hello, yes... yes... ah-a.... umh...") and ending with "sorry mate you were talking to a voice mail, now would you like to leave a serious message?". I did it because I gave up trying to opt-out of every company calling me. The point is to irk them by keeping them on the phone (they are paid mainly by commissions so every second wasted counts) to the point they will flag me as a 'time-waster' and not call anymore. It works surprisingly well.