I work for the local authority and we have all our vehicles fitted. We lost a JCB from a site a few months back was there friday but not on the monday. I went have a look and found it at a caravan park 20 miles away phoned the old bill who met us there got the £40k machine back!! Also we were loosing diesel all the time seems to have stopped now. As most have said if your not doing anything wrong no worries!!