sad to say its been tried before, theft for breaking was a massive industry in the bike world, the only thing that put the pro's off seemed to be fitting either datatag or smartwater, the feds could simply breeze through the breakers stores departments waving a lamp or a scanner and be home in time for cakes - a good number of breakers went to jail and the others got smart and refused to deal with anything hooky (and no, I realise not all bike breakers were bent before anyone spits the dummy). With a Landy based autojumble or sortout it would be even easier for the bronze to scan a heap of stuff in a small area making nice easy collars with the minimum of effort..
Would it work with Landrovers? yep
Would people be prepared to fork out the datatag fees? pass
Would the feds follow it up or do any high vis sweeps and patrols? erm, pass.
They could always rope in the community support brownies (or whatevers being used to replace the police this week )