I do recall a "fashion" amongst chavs for deliberately walking down the middle of the road, about 4 or 5 years ago, which didn't seem to last very long (thankfully!)
I remember one incident in Southampton where a group of about 5 lads were doing it, walking along in the middle of the road (deliberately, apparently), shoulders back, swaggering like chavs do, with an ever increasing queue of traffic behind them. A guy on a scooter came past and they tried to push him off, then I went past in the inside of them on my bike and they shouted a whole load of abuse at me.
They must have been as thick as pigsh*t though, because as soon as I'd found a reasonable stopping place I phoned the police and gave them descriptions of all of them, including what they were doing, plus they were walking through an area that had plenty of CCTV. I imagine that the police would prosecute under those circumstances.
Luckily though, as I said, it would seem that that particular "fashion" has gone away now.