A friend of mine has a PO Box. and after listening to why she does I am thinking of doing the same. I would feel comfortable doing fabric or book swaps if I have a PO Box. I do not and will not give out my address, phone number or my last name. Sadly in this world of you have to be careful. She also uses her PO box for her address on her credit cards and bank statements and for just about everything. You also can get a PO Box in a different state if you work in another state other then where you live.