Have you ever come across an EX on a dating app? A recent survey found it's happened to 40% of online daters . . . and 24% have seen a family member or coworker on there. So this might be a popular feature.
Tinder is adding a new "Block Contacts" option that lets you avoid people you know in real life. You just have to let the app access the contacts on your phone. Then it'll make sure they don't show up in your feed. And they won't see you either.
You don't have to block ALL your contacts though, you can choose which ones to block. They recently tested out the feature in Asia. And the average person blocked 12 people from their contacts.