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A comment on Let’s Destroy Robocalls. Parent comment

Re:Let’s Destroy Robocalls by MBCook on Monday March 04, 2019 @03:46PM (#19305248)
That sounds like a huge hassle, which would probably make it a no-go.
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Re:Let’s Destroy Robocalls by Leace on Monday March 04, 2019 @04:36PM (#19305809)
QR codes are widely used in China for example for quick transactions: https://a16z.com/2017/08/11/qr-codes-in-china/
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Re:Let’s Destroy Robocalls by mindslight on Monday March 04, 2019 @04:34PM (#19305796)
It's actually a longstanding part of phone culture - "extension xxx". It doesn't need to be terribly long to keep out spam - having to enter a single digit would fix the immediate problem, and even when the spammers adapted 3 or 4 still seem sufficient.
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Re:Let’s Destroy Robocalls by amelius on Monday March 04, 2019 @03:49PM (#19305282)
Yes, it sounds like how PGP failed.
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