Meh, it's an old schtick to be honest. There have been plenty of "real world super heroes" and like usual they are all doing it wrong. If your just going to walk around publically like that and people are going to easily find out who you are, you might as well just drop the entire super hero schtick.
Down here in New London one of our main roads called "Bank Street" periodically goes through periods where it's really bad and covered with hookers and drug dealers. One rather large, muscular, mean-looking dude, took to walking his (large) dog up and down the street wearing a beanie and a sign saying "Drug Free Zone". Pretty much inviting people to make somehting of it. He seems to have retired, but I remember him, and he did make a differance without bothering to call himself "The Viper" or the other stuff these "super heroes" do. I mean honestly, even if he's out there for hours at times when most normal people don't walk the street, there is no law against walking his dog....
At any rate, for those interested in real life super heroes here are a couple of sources:
My personal favorite:
http://en.wikipedia.org/wiki/Richard_McCaslin
http://articles.sfgate.com/2002-01-24/news/17525248_1_bohemian-grove-women-s-groups-richard-mccaslin
Encyclopedia Dramatica Also assembled a bunch of these guys into an article:
http://encyclopediadramatica.com/Real_Life_Super_Heroes
Linked mostly because of the number of them (with pictures) and assorted links.
Wikipedia also covers the same thing (less offensively) but also has less information when you get past the "style" of ED.
http://en.wikipedia.org/wiki/Real-life_superhero
The bottom line is that what this guy is doing is old hat, now if he was actually unknown and effective (like an actual comic book hero) it would be something else. However good samaritans/neighborhood watch types in costume, which is what this guy seems to be doing, have been around for a while. As has the occasional failed whack job, like "The Phantom Patriot" who at least tried to do things right, but failed epically, and was acting based on some kind of delusional conspiricy. The bottom line was that he tried to conceal his identity and armed himself appropriatly at least.
Out of all the real life super heroes, the one I'd most like to drop by if I was in need is the ultra-heroic "Angle Grinder Man". While I've never run afoul of it, I don't like the idea of car booting, and I believe the police abuse it. He doesn't fight crime (actually since he breaks the law he could be considered an anti-hero, or even a minor villain) but does seem to make a differance by all reports.