If you know someone in the Freemasons, you can pray them out, just like anything else. Pray your rosary to get them out, and see how powerful the rosary is over the Freemasons. I know someone who's done this a few times, and the turn around was pretty fast. lol If a person is obstinant, they may not be converted right away, but the earlier you get them the lesser hold satan has on them. Pray them out; they'll either leave on their own, or they will get the boot. The devils don't want someone around who's causing them that much spiritual warfare. They don't want to have to deal with our Blessed Mother. It's so powerful, it's almost funny. I know of someone who prayed out freemasons, one of them wasn't even a believer in Christ, yet he blamed the prayers of the person who told him that they were going to pray them out. He was apparently mad, but never-the-less, it's another one out!
Ha! I know of someone who actually used to go and park in front of a freemason building and pray the rosary.
:light-saber: the force is with you, if you pray your rosary