I think it's just the right length. If someone gets in front of it, it will only take 2 minutes to read.

Also, the sign (to me) summarizes what we have all agreed upon and is sort of a symbol of "agreements". Bystanders will probably read it as much as anyone and it will probably serve to represent our good intentions to them as much as reveal to other kiters our "rules".

In addition, as stated, it will probably end up on here, and in other places for others to view.
The sign is about as long, right now, as those at most pools or hot tubs.