Experts though can we trust them?
Having thought about this much more I think you might have something.
It will be easier to see a slope if the flag is placed across it, ie one end of the flag can be seen to be higher than the other when crouching to look back at at the flag as Patrick does, if this breaks the rules or not I can't say for sure but I think it's certainly using the flagstick in a different way to it's designed purpose, if that's what they're doing.
Whether or not this makes me arrogant I don't know but I'm on your side Philby.
It will be easier to see a slope if the flag is placed across it, ie one end of the flag can be seen to be higher than the other when crouching to look back at at the flag as Patrick does, if this breaks the rules or not I can't say for sure but I think it's certainly using the flagstick in a different way to it's designed purpose, if that's what they're doing.
Whether or not this makes me arrogant I don't know but I'm on your side Philby.
This is rapidly turning into an exercise for the golfing tin foil hat brigade.