Can I stop a friend from going there

No you can not stop them but you can ask questions

You should. They or their children will have the right to own firearms removed. It will cost over 10,000$ to pay a lawyer to have it removed. This will not only waste money in the future, but time as well. The legal removal(302) process takes up to two years...legal fees.

Im not going but she doesn't want to go there at all costs so I don't want her to go because I miss herok thanks

Not really. But you can go and ask questions. Even the question of ......why are we here.