Here's a doozy for ya

[OakTree]

Originally Posted by JasonTX

Illegal kick. The ball remains live because Team A has not kicked it. Team B kicking it does not cause the ball to be dead. If B gains possession of the ball it becomes dead. The holder is the last player from Team A in possession and when the ball is kicked by team B, only the holder can recover to keep the ball live for a possible advance by pass or maybe exchange it with a teammate. If a teammate recovers it, the ball becomes dead (4th down fumble rules). The penalty for the illegal kick is enforced at the previous spot and the Try repeated.

As for the size of the tee. Techincally they could bring a 12 ft. 2 x 4 out there as long as it don't violate the maximum height requirements. There are no other dimensional requirements other than the height.

I actually used the same example you did about the 1"x4" that didn't violate height. It seems common sense to me that that wouldn't be allowed, but as you mentioned, only the height is referenced specifically in the manual, so I'm not sure what I'd say to the coach who tried to use it.

What about this stipulation earlier in the manual, could it be applied?
Field Areas
ARTICLE 9. a. No material or device shall be used to improve or degrade the
playing surface or other conditions and give one player or team an advantage
(Exceptions: Rules 2-16-4-b and c).

OR

Illegal Equipment
ARTICLE 7. Illegal equipment includes the following (See Appendix E for
additional details):
f. Any equipment that could provide an unfair advantage to any player.