No, you are just watching not catching them.
Belonging to such a group does not give you the right to pack. One needs to jump thru the proper hoops in order to carry, or carry concealed.
No, most Neighborhood Watch People do not carry a gun. There would not have to be a Neighborhood Watch People in the first place if there was no crime. Why don't you attack those who are committing those crimes? Then there would no longer be a need for a NWP.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them