1 Corinthians 5 "They will only bring you down"

Well, the old saying about how if you are around people you don't want to be like they will only bring you down; the Bible tells us so.  The way I understand it, if we love our brothers and sisters in Christ and we see they are not living a Christian lifestyle we should confront them and if they are not going to change, they get rid of them, clean house, don't be around this person.  Now you and I can't get away from sinful nature all together we would have to leave this world to do that but we can control how much we are exposed to and don't forget Jesus ate with the thieves and beggars; so we should too but we must make sure we have a strong enough faith to do so. 

An evil person works like yeast, even a little bit will ruin the whole batch.