Sure, there are lots of places where that would not be a problem. Carrying a fixed blade concealed is a crime almost anywhere without a permit. However, carrying a fixed blade around in a belt sheath without good reason (hunting, fishing, work, etc) can also get you in a lot of trouble. It will make folks notice you.
You might be able to get away with a small (less than 5 inch blade length) FB depending on where you are in everday life (Montana, Idaho, etc). Some states like mine have laws that make it illegal to carry Any knife, whether concelead Or displayed if carried with the Intent to use it as a weapon.
So the legality of carry will be determined by the cop of the street, his psychic abilities to determine your intent, and probably by how old you are, how you are dressed, where you are, and what you are doing. Given the law in my state, when I carry small fixed blades, I keep them concealed to avoid undo attention. And I never carry any knife with the Intent to use it as a weapon.
If confronted by a LEO about carrying any knife, and you use self-defense as your reason for knife carry, you will lose the knife for sure, and may be going to jail, as well as court.
Good luck!
Paracelsus
[This message has been edited by Paracelsus (edited 11-29-2000).]