> The same as if they start emailing you all the time: you block them. > And since phone numbers are harder and costlier to just generate and use, that block i

> The same as if they start emailing you all the time: you block them. > And since phone numbers are harder and costlier to just generate and use, that block is more meaningful blocking an email address. You might think that but throwaway phone numbers can be bought cheap for the purpose of spamming. I cannot think last when I got spam emails in my inbox. I can however think of when I got spam SMSes. It's also obviously cheap enough they can use robots to say things too. Could this be because someone who knew my number had a compromised phone? quite possibly. I am not very happy about Facebook having my phone number even though I don't have an account with them.