To many, some clueless safety bod decides its a tick for increased safety and ignores the fact that having a car in front of an aircraft when the braking action is poor is not a good idea. Some I suspect its a job creation scheme just as a revenue generator. Although sometimes its appreciated around work in progress or some weird stand that usually you won't go near with a chance of getting stuck.
You can have what ever you like on just make sure you can dim the bloody light at night and in rain. All it does is kill our vision so we can't see sod all apart from a splat of to bright light in front of us which we have to squint at and try and not to hit it. So bright in fact we can't actually read what's on it because it hurts.