Earlier quoted context omitted.
> If you don't want your phone number leaked don't hand it over to a random website that pinky swears it won't keep it. What's the worst they can do with it? Call me all hours of the day trying to sell me an extended factory warranty for my free Medicare brace that, by the way, has a Security Number that is under arrest by the Security Administration because it made fraudulent IRS payments with iTunes gift cards to l…
"The worst that can happen"... In a world where your bank thinks that SMS is good enough for 2FA... phone number plus other info is good enough for credit reporting agencies to send out your complete file... Variations of this theme. Also, this dump is once more confirmation that Facebook owns lots of data about its users, and doesn't care to protect that data, or to give its users the ability to control personal inf…
I found FastPeopleSearch.com, which not only had my current phone number and physical address, but my previous cell phone number, land lines (from back when those were a thing), my Vonage phone number, and previous addresses, all dating about 20 years. If you know my name, you can get a lot more... thanks to these aggregators of public records.
You can attempt to have yourself removed but there are a lot of these types of sites.
Of course, if you take "a" phone number, and use the google search technique, you'll find one of those sites like FastPeopleSearch and learn a lot more about who the phone number belongs to. But presumably anyone who's trying to make use of all this information could do all that without the Facebook breach, if they automate the process.
Of course, the Facebook breach ties a bunch of information to a phone number in a, perhaps, tidy package?