I don't play enough to say where the rules may or may not be, but that's not my issue. If you use that as justification, then even hackers may say "well I didn't know I couldn't hack, and I don't see any rules anywhere!!!" Where is this line for what rules are common sense and what are not get drawn?

I'm not a GP, all I'm saying is that ignorance is never an excuse for breaking any rules. Whether or not they have made rules easily found is not my problem, though it is a problem if they're not somewhere easily accessible.