However this will make your relationship with that faction go down. If they belong to a different faction, they’ll likely not join you, so if you really want them it’s better to capture instead of rescuing. Again, check their stats and see if they’re worth your time. They will be hurt and need medical attention. So it’s sometimes not a gamble worth taking. They give you a bit of information about themselves, but you won’t know details about their skills and traits.
Pyromaniacs, for example, will set fire to your base from time to time. Sometimes bad traits can be managed, but sometimes that’s a little harder. See if they are good or bad and worth your time. People who don’t haul or don’t care for the injured are bound to give you a headache.
Whether they’re friendly or not, being too close will cause your relationship with them to constantly deteriorate.