General

I like to chat with other people on FF sometimes, but I also feel like I can't fully trust people on FF because I'm worried they could have bad intentions.

I'd wager a little over half of users here are bots and scammers. Anyone who wants to go off site right away, I wouldn't trust.

For the real users it's a hit or miss. If you feel uncomfortable inform them of any boundaries you have.

Don't trust anyone right away. Facetime with them so you know they're real, but don't meet with them in person or send them nudes or money for a few weeks. If after that time they haven't broken any promises and you haven't caught them in any lies, you can gradually go to further steps. Whatever those may be.