This from Running Sucks:

“I learned about all these run clubs from Instagram, but we’re doing a new thing where if you wanna get with South Central Run Club, you have to be in our Signal chat. South Central deals with hyper-policing. Most of our runners are Black and brown and you never know when ICE is gonna pull up. Instead of broadcasting our runs and making us vulnerable to surveillance, we stopped putting it on Instagram to make people feel safer to come and hang out.“

You just never know who is watching your Instagram feed, but you can manage who’s on your Signal chat.