Well, my fears are that it would effectively mean we had to have a licence. Although I am not 100% against a licence I do feel that this would bring it in through the back door which might cause extra problems.
On the other hand, of course your 100% right, we think we know we are safe when we may not be. Experienced window cleaners do have accidents.
I will vote yes on the safety aspect, but it would seriously cause a real upturn of the industry if it happened and I doubt any of us would really like it.