They are utter wankers. A main road near to where we live, it's been plagued (as are so feckin many) by boy racers in the evening and right through night. All clearly in top end high powered cars that not a one could afford to be driving legally. (That most are uninsured and on false plates negates them caring about such)
Following a huge campaign by neighbours across the area about this issue, the police in their wisdom decided to act on our behalfs.
So, they set up a mobile speed trap on the worst stretch for five whole days .... yes, DAYS. Mon to Fri from 9 am to 4 pm.
They managed to catch many speeders, mostly locals doing a few mph over the limit. Clearly life threatening criminals. They thought it was a job well done.
Of course, once those plod were home each evening for their dinners, and feet up watching the box, the the same fucking idiots still were out doing easily 80 mph on the same 30 mph stretch.