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A comment on Let’s Destroy Robocalls. Parent comment

Re:Let’s Destroy Robocalls by penagwin on Monday March 04, 2019 @01:40PM (#19303930)
Plus how would we share this "pin"? Maybe we could append it to the phone number, like "+1 (616) 281 - 2123#32343" - Oh wait, it's already a number, what's the point of adding more onto it? It would literally turn into the same system that we have, as you have to share the pin with everyone anyway.
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Re:Let’s Destroy Robocalls by Evidlo on Monday March 04, 2019 @01:48PM (#19304020)
It's different because then not every "number" will result in a call being placed. Determining whether a number is valid requires making a call, which ties up robocallers.
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