[pfreivald]

A. If you're in a position to block shots--that is to say, in your opponent's Auto Zone--your opponent can be up to 84" tall, and you can only be up to 60" tall.

B. Many shooters won't be 60" tall, and Frisbees shoot close to straight, so this will give you the impression that you can likely block a lot of shooters with a wall-bot. But you probably can't, because...

C. If you get in front of them, they can likely shoot over you because they can use the pyramid for protection -- they'll tuck mostly under it, and if you move up close enough to their robot to block their shots, they can bump you while still in contact with the pyramid and then get penalty points for their alliance. This will force you to stay a reasonable distance back from them, allowing them to shoot right over your head into the 3 or 2 point goals.

FIRST games are hard, and strategies can often be maddening. When considering robot design, I think it's a mistake not to hash out every strategic and tactical implication of any given design that you can possibly think of -- and to do that, you need to have an iron grasp on the rules.