Who is BNE?

Who is BNE? Surely everyone who spends a bit of time in Bangkok these days must have noticed BNE in form of stickers, tags or graffiti plastered all over the city. You can find BNE just everywhere in Bangkok and I mean there must be thousands of those tag-lines around the City of Angels. Now the question which comes to mind is of cause "Who the hell is BNE?".
I have tried to find an answer in the Internet and quite interesting there are few articles about BNE and even some videos. Apparently police noticed the first BNE stickers in San Francisco in May 2005 and since then BNE has gone worldwide. Sticker appeared on phone booths, post boxes, street signs, walls, vending machines and parking meters around the world from Prague to New York, from Tokyo to Hong Kong and now in Bangkok.
The B-N-E mystery remains unsolved so what could the acronym mean? Well, BNE is the three-letter airport code for Brisbane (Australia), some suggest it might mean 'Breaking 'N Entering' or 'Be Nowhere Else'. To be honest I have no idea so if you come up with something better please let me know. Sometimes the letters BNE are accompanied by the words 'was here' or as in the picture taken at the Queens Park on Sukhumvit with some Japanese symbols.