Rugby

"The lifted player is dropped to the ground from a height with no regard to the player’s safety. A red card should be issued for this type of tackle."

http://www.rugbyrefs.com/content.php?224-Alain-Rolland-and-Sam-Warburton-s-Red-Card

That link is implying that the memo is stating a zero tolerance on tipping, but there is still a matter of judgement as to what constitutes regard for the player's safety.

Far from saying it's a straight red for any tipping, the law accepts that it happens even with regard for the players safety. And the lack of red cards for similar offences throughout the tournament demonstrates that.

The Ref should have reviewed the video, I suspect the immediate French reaction had a lot to do with his quick decision.