Our house backs on to the playing field of a8 primary school (UK, kids aged 4-11). There is a low fence between our garden and the field. Kids seldom but occasionally approach right to our fence.

Our cat likes to kill stuff. We try to stop this by keeping her in at night but occasionally she sneaks in with a little mouse corpse. When she does, I dispose of it by chucking it over the back fence. A family of foxes lives back there so I assume they get rid of it, and if not, kids love dead things, right? 

I could put them in the bin but when she brings in live ones I put them back over the fence so must have got in the habit.

TL;DR when our cat brings in dead mice is it bad to chuck them onto a school playing field?