"using people's cellphone numbers [...] to target them with adverts"
That's why I'll never use any service that requires my phone number to be registered or login.... and of course also because I don't want to give them an almost perfect unique identifier.
Unluckily, I can't kill the friends who let their phonebooks to be slurped.
What do the many people here who defended the practice of asking your phone number think now?
Biting the hand that feeds IT
