I just can't see what the big deal is about throwing a bit of grit down! As I said, one yard we were on were really weird about it, wouldn't even let us put our own down! I think its a poor do when the horses suffer because of it, ie, not being able to even get them out of their boxes! (You try walking a fizzy horse up a cobbled icy track)!!!
I think if everybody applies a bit of common sense and doesn't do stuff like wasting it and chucking buckets of water out at night - then there shouldn't be a problem. I do understand YO's don't want claim's being made for areas that people slip on, but if folk are going to make a claim for that, then they're going to make a claim if it ain't gritted anyways?! (Hope that made sense!).