The other day I logged out of Instagram on my phone, created a totally new account (for our dog), cleared all the cache and it STILL found my coworkers.
I didn't want my coworkers to see my dog account because I act silly and want to be professional.
I'm CERTAIN they just sent data I didn't agree to send (phone number, etc).
They didn't re-prompt to access my contacts so I assume they think that since the APP has permission every account I create ALSO has permission to access my contacts.
Fuck facebook!