Since we cannot say where w can encounter ghost I don't think there is a way to us to avoid seeing or feeling them. Even in Church, there are lots of ghost too. Me, if I have a goose bumps, surely there is an energy around me that seems like a ghost but since I haven't seen it I cannot say it is a ghost. As one of the people living in this earth, there also some energy that the passed people left here on Earth and they are appearing without us knowing. It is creepy when we see one and sorry that it is part of our struggle here on Earth. You just need to pray to do not encounter or feel one, or if one day it happens, you pray that you will be open minded that there are spirits and souls on Earth with us. You need to pray for yourself to be strong when you see one.