What if I tell a girls ex her baggage?
That's mean. Have you talked before?
I have never spoken with her
It is bad to spread gossip when you might be wrong. If you do this people might spread rumors about you behind your back too.
I might not know her but he is a friend of mine so I think I'm allowed to do it.
You might want to help your friend by letting him know but if you are spreading gossip, you are just giving him information that might be wrong. Then he might get upset for no reason.