The invention of Microsoft has been released (US 2019/0028841 A1).

This system is let you know the place and timing that you might to encounter dislike people if you go as you scheduled.
And you can know another route to avoid meeting with them.

Their position is determined by GPS, analyzing SNS check-in function and photograph’s location information etc. (CNET Japan)

It seems possible to meet someone you like by using this system, but you will be banned by Stalker Control Law.