The thing is, the cable they nick has to be sold on somewhere and that would have to be a scrapyard or metal dealer which are probably also run by pikey's, so why the hell don't the police target these places???
Probably too scared! :-?
Can't say for all forces but certainly one of the Dog Handlers in Hampshire wasn't happy about having to put his dogs into a site occupied by travellers 
Yes times change without doubt.
In times past a section or two of SPG (Special Patrol Group) would have covered investigators making enquiries in such sites.
Had any of the natives shown their dissatisfaction by engaging in violence they were treated to a practical demonstration in 'positive reinforcement'.
Although I'm quite an open-minded soul (by necessity) I must say that, as a group, a substantial number of 'Pikeys/travellers/gypsies' seemed quite adept at avoiding answering questions in any meaningful truthful way.