I do wherever/whenever I can for the simple reason I wear shorts virtually all the time and no matter how careful you are there is always a splash back. This also goes for when I'm in a pub at the urinal and you can feel little bits of urine hitting your legs from fellow pee'ers bouncing off the ceramic.
I remember a documentary years ago where they gave volunteers special trousers that reacted with urine and sent them out into different situations and every one of them came back with urine covered trousers.
Cubicle for me, every time.

But yeah, that's real gross.
