Quote:
I very quickly realised that it was easier to just tell them "I am hanging up now".

Prior to the U.S. creating its national do-not-call list, I had likewise dispensed with any sort of social decorum when dealing with phone spam. Texas law, at the time, said that if you told them not to call you back, they could be subsequenly fined if they did. I'd usually start by explaining their legal obligations and very rarely would I be able to finish my sentence before they hung up on me.

Subsequent to the national do-not-call list, the calls largely stopped with the only exceptions being the local police's benifit organization (which, I understand, is not legally a charity) and pre-recorded political junk around election times.