I doubt it, At a guess all it does is tell you how many other vita users are in radio range and lets you play against them. Radio range is about 150 feet at best.
most applications have a guide. and if they dont you can always go on google and type: guide on how to use X application. heck i even use it on stupid questions that come in my mind like : if i drink coke every day for the rest of my life will that make me a stupid person? mindception
It shows my address and im not sure whether or not others can see it. You read my previous post. So you should know that my Vita is used. Derp-ception