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Fairly sure someone is. I haven't been using FB for months and last week received a "messenger sign in code" SMS from FB. (I use LastPass btw with each site the

• developer2 10y ago
  Phone number reuse is also a major pain in this scenario. If your mobile phone number has ever changed, you still likely have the old number registered with many sites. The SMS you received may not have been for your Facebook account, but rather for someone else's account using your new phone number that used to belong to them. The number of sites that use - sometimes even requiring - SMS as a backup authentication mechanism, even while you use a separate authenticator app, is astounding. Cell phone number recycling is just as bad as email addresses.