[drugsAreBad0001]

> He says this whole issue is mainly down to your phone number.

> Facebook goes through your phone book ... you give it permission to do this when you install the app.

This is 100% demonstrably false. It literally comes down to advertising/tracking.

Because tinder is ad-supported for the free app, they're sending data directly to advertising networks (of which Facebook is one), and that's being used to track you. Period.

On iPhones an app specifically has to ask for permission to read your contacts beforehand. There's nothing "implicit" about that, you literally have to agree it explicitly.

I really wish the COO at a Security research company wouldn't spew nonsense. And people wonder why the general public is misinformed as to the harm of advertisers/tracking.

[wodenokoto]

Most phones are android though and there you have to give up your contact list or simply not install the app.

[dragonwolf]

I wouldn't be so sure. I noticed for the first time just a few days ago my phone's contacts were showing up on Facebook as suggested friends. These weren't facebook profiles, just a name, phone number and the option to email them. I checked all my settings for facebook and messenger apps and all 'sync contacts' options were disabled and I have never enabled them. I'm on android. So, my guess is they were somehow granted permissions on installing the app and then the options to disable this actually don't do anything. If there was an option upon install to deny access to phone contacts I definitely would have denied it - if they don't provide the option to do this on install, they're being sneaky.