@keith: When functioning as rules guy, I try to avoid the word "should". How a rule should work is a matter of opinion, especially since, as you pointed out, we have a better chance of spitting on the Moon than we do of knowing exactly what GW intends. If it helps, here's how my rules guy-ing process generally goes:
1. Learn of rules dispute.
2. Read rule. Is meaning ambiguous?
3. If rule text is not ambiguous (determining this is often the lengthiest step), apply rule as written.
4. If rule text is ambiguous, apply ruling most in keeping with reasonable expectations.
Step 4 is the only time I let "should" come into play. Otherwise, I'm deliberately changing the wording to fit my own notion of 40k, which is probably very different from what a lot of other people have. I'm a casual player at heart; I play 40k from a zone where everything's a lot friendlier more whimsical than what sometimes actually goes on at a tournament. So when I make a ruling in a tournament setting, I pretty much put my own feelings on how the game should be played aside, in favor of the most objective interpretation of the rules that I can manage.
So that's where I'm coming from. Looking forward to seeing everybody tomorrow! Let's play some Warball!