@Shatners - Ok I was starting to think you had a point, but now this. Of course coppers take orders from senior coppers, that's how it works.
They have some leeway though, and there are rules about what they can and can't do.
I seriously doubt the senior coppers said "if you see someone covering their face, demand they stop". I will resist making an obvious observation - but you can probably imagine it.
So I think they made a serious error of judgement and overstepped the boundaries of the law.
I have personally witnessed coppers being sworn at in a highly. aggressive way and they dealt with it in a professional manner without issuing a fine - of course once the swearing happens, the option to fine is there, but they could have let him on his way, and I am fairly sure that wouldn't have been against their orders from above.