Earlier quoted context omitted.
IIRC, you have to auth to Tinder with a FB account. Not saying that nothing shady is happening, because I believe it is, but note that there are hundreds of ways for a company like FB to connect the dots. Post locations, event invitations, friends of friends, searches, ads/trackers, even your behavior/patterns on the site. The only real options, IMO, are to delete FB or accept the uphill battle.
IIRC, you have to auth to Tinder with a FB account. Wow. Just wow. That seems like such a horrifically bad idea. The worlds represented by FB and Tinder are almost diametrically opposed and I imagine that people who use both would never want any mixing. We are one FB bug away from some serious embarrassment.
> We are one FB bug away from some serious embarrassment.
FB has been squirreling away phone and credit card numbers for awhile, along with DoBs, family members, birth cities, and pet names (i.e. "answers to common security challenge questions"). I wouldn't be surprised if a lot of this information has already been stolen, and is being used for things worth more than a bit of embarrassment.