UPDATE: Want your own "Base" shirt? I've identified the guy's shirt as the one being sold by ThinkGeek here.
A rare sighting today: someone wearing an honest-to-God "All Your Base Are Belong to Us" t-shirt! I spotted it on a pretty typical looking example of the North American geek-boy. It wasn't immediately clear whether the shirt was being worn ironically or not, but after a quick examination of the specimen (Bat-Man tennis shoes, cargo shorts, etc) I got the feeling this was an actual geek, not a hipster posing as one.
I'm not sure what someone's motivation would be for wearing such a shirt in 2011. No clean laundry? Nostalgia? Some sort of retro-geek statement? "Man, internet memes were so much cooler back then. Bronies? Fuck that shit."
This spotting was not as cool as the time I saw a guy in an airport wearing a Big Johnson Surfing shirt which looked to be in pristine, brand-new condition. This was in the mid-2000s. Apparently, somebody still make those things.