I remember watching one of these reality police shows when they chased a stolen van through South Yorkshire. The look on their faces when they realised it was heading for a Pikey site was priceless. They absolutely shit themselves when it went into said Pikey site, and if the cameras weren't rolling I would have put money on them turning around and whistling whilst saying "nothing to see here". Instead they had to front it out whilst an entire site of enraged Pikeys surrounded them. They even caught the head Pikey changing the number plates on a stolen 4x4, but naturally he didn't know it was stolen.
I'd forgot all about this episode until I moved to South Yorkshire and found out the Pikey site a couple of miles up the road was the one that had been on telly.