err no, why is this so difficult, you have a car with some rubber nobs slightly exposed, presumably parked in the street as you won't tell me, somebody random who just happens to be wandering by, checks the coast is clear and carefully removes your rubber nobs that are totally anonymous but are not straightforward to remove. The person can't have been drunk as they would never have successfully removed said rubber nobs.
Maybe they reach down and steal the bog standard dust caps while they are there.
So in summary personally I cannot imagine anyone doing this in the circumstances I would imagine the car to ever be in. But maybe I'm just a country bumpkin who doesn't understand the ways of the big city.
As you are being so defensive I may never get to the bottom of the circumstances.