I wish there were more votes, but most people seem to think markings should be illegal; not just 'lame', but illegal. And some who voted yes just did so because it's unenforceable, but might still follow it if it's a rule.
There hasn't really been a good argument for allowing this stuff other than unenforceability, but once again, no one seems to be arguing that due to that, we should allow macros. We just need a short sentence in the rules:
*No using any kind of external aids while playing (for example, using a ruler to help you aim).
That covers pretty much all the crap we've been talking about, kami rulers, markings... audio CDs you recorded of yourself listing BnG distances. As afraid as some people are that this will give noobs evil ideas (although hardly anyone fully reads the rules), a lot of them will surely take it to heart and not even think about 'clever' ways to aim, knowing they're illegal.