I'm coming to this late, but a few points:
I can see no reason for a team to stand their receiver close to 10m back unless it's a screw up, and I'd have no qualms about penalising.
If someone more imaginative than me could think of a reason I'd expect them to ask the referee about it before the game.
If a team is throwing in to a defensive 5m lineout and didn't have an obvious receiver I'd ask if they have one and who it is (TBH I'd not thought about such a situation before this thread).
I'm sure that it used to be quite common to have the receiver behind the rest of the back line before lineouts had to be at least 5m out.
If an assessor pulls you up for a law error, unless it's clear that he's wrong, don't argue. You might have him again next week!
I can see no reason for a team to stand their receiver close to 10m back unless it's a screw up, and I'd have no qualms about penalising.
If someone more imaginative than me could think of a reason I'd expect them to ask the referee about it before the game.
If a team is throwing in to a defensive 5m lineout and didn't have an obvious receiver I'd ask if they have one and who it is (TBH I'd not thought about such a situation before this thread).
I'm sure that it used to be quite common to have the receiver behind the rest of the back line before lineouts had to be at least 5m out.
If an assessor pulls you up for a law error, unless it's clear that he's wrong, don't argue. You might have him again next week!