The one person who took more that a passing interest said something along the lines of "I like" as he wandered past. I asked him what exactly he liked, and he revealed that he was, indeed, referring to my dreadlocks. He did not expect what happened next, which was that I produced my scissors and asked him to cut one off. He seemed fairly happy to take the scissors and make the cut.
The guy also seemed happy to keep the dreadlock. When I asked him for something in exchange, he went into the standard mindset of believing that he did not have anything with him. I think he really believed this. In my experience, the majority of people carry clutter around with them and have no idea that they are doing so.
He was holding a bottle, and I said anything is OK, even an empty bottle. Then his friends noticed that he had around his neck a black and yellow towel featuring the name of one of the bands that had been playing. This seemed to both of us to be rather a good exchange, so I came into posession of a sweaty towel, with "Yama Arashi" emblazoned on it in Japanese and English.
The boy danced off, dangling the dreadlock from his head. He was pretty hyper. It would not surprise me if he lost the dreadlock on his way home.
On to the next encounter.