Typical excuse to check for drinking I'd say.
I was stopped once because it looked like I was going quickly and it turned out they were doing a campaign because residents had complained about speed and there were children playing in the area. Now these kids often just ran straight across the road. It started well when I asked mim what speed I was doing. He had an accomplice with a gun. He said they hadnt recorded my speed. I asked the patronising ****...errr...officer...if he had educated the parents / kids about the dangers of playing near a busy road. He didnt like that much but told me he had.
Unfortunately I dont think they can be charged with wasting public time.
But in your case your a marked badass I reckon...