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Re:Parler is back online after a month of downtime by rvz on Monday February 15, 2021 @05:31PM (#26148436)
Then I will get spam through my phone number then each time I register it for 'SMS authentication'. Then you'll later ask how did these services not only get my phone number, but also upload my entire address book for 'security reasons'.

A captcha is more than enough.

Re:Parler is back online after a month of downtime by ufmace on Monday February 15, 2021 @07:02PM (#26149378)
You're right that you may get a lot of noisy authentication spam texts. Alas, none of the companies involved seem to care. Judging by their popularity, most of their users don't seem to care much either.

Is a captcha enough? I've never worked in bot/spam mitigation for a large public platform before, so I don't really know. Based on how universal phone number requirements are for these services, and how much trouble they seem to have gone to in order to block using easily purchased numbers, I'm going to guess that captchas aren't enough.

Re:Parler is back online after a month of downtime by Can_Not on Monday February 15, 2021 @08:08PM (#26149811)
It's hard to say captchas are or aren't enough because you know most companies just want your phone number for ulterior motives.