As I pay little attention to what I´m doing at any given moment I managed to happily stick a tubeless high roller on my rear wheel with the rotation facing the wrong direction.

It actually looks like it might give more traction that way.
Does anyone deliberately do this or should I just stop trying to avoid the faff of switching it round the way maxxis wants it?

Are you elite enough to really notice a difference while riding, without looking at the tyre?

lots of tyre makers suggest reversing the tread on the back anyway as rear mostly generates drive while front does stopping & steering

(and wot xiphon said)

Are you elite enough to really notice a difference while riding, without looking at the tyre?

Ha, I´d be doing well to notice if it was inflated or not (once rode a good 15mins on a punctured and deflating tire.
The only thing I did notice was, compared to my old xc bike with 2.1 nobby nics, this one (2.35) rolls like a tractor on the road.