I have some friends that are short and I'm feeling like banning them from talking to girls.
Why would you want to ban them from talking to girls?
I just realize that when they stand next to girls they feel insecure.
Your friends have no control over their height and you have no right to bully them because of it. They can't help that they're short, and they need a lot of care and understanding instead of you belittling them and making them feel horrible.
I just want to help them by not allowing them to interact with them. I mean haven't you heard of some short person doing bad to a girl before.
You're not helping them at all by not letting them interact with women. Doing this will affect them socially, and they would also probably be unappreciative towards what you're doing. I recommend just letting them do what they want when it comes to socializing with women.