Yeah, better, ban all the telephone cold calls. Noone answers them anyways... For the fairness, compared to emails, I guess this one's a bit harder one to solv

Yeah, better, ban all the telephone cold calls. Noone answers them anyways... For the fairness, compared to emails, I guess this one's a bit harder one to solve -- There are bit of context to work with -- address, contents, etc., and there are so many to classify and get feedback against. (To be able to effectively filter therm, it'll need a lot of spams, as well as non-spams!) Screening phone calls is hard, considering those systems can only work with a phone number which may be spoofed (although, with STIR/SHAKEN, this is increasingly getting some attention). There's a lot of privacy implications (and perhaps a bit of legal implications) to be able to scan contents of the call.