[thunder]
IGNORANCE IS NO EXCUSE!
[/thunder]
Haha... so I can't help it. I'm an attorney, and I have to weigh in on this one. Ignorance really is no excuse. If it's a statutory crime (think speeding, loitering, things that are not inherently wrong), then ignorance usually won't get you off the hook, with few exceptions (yeah, I've gotten a ticket after I tried explaining to the cop that I didn't see the speed limit change--haven't you?). We are expected to know (and obey) the laws of the land, even if they seem silly or are not otherwise intuitive; the fact that you never bothered to look them up or were not paying attention won't help you.
If the crime is a common law crime (think murder, stealing, lying (aka fraud)), then ignorance *really* is not an excuse. These are seen as crimes against nature and are inherently wrong. People are supposed to naturally understand that they are wrong, so explaining that you "didn't know" doesn't hold a lot of water. Of course, you can opt out by pleading insanity, but that generally leads to a lifetime in the loony bin, which isn't exactly a vacation.
So I guess the long and short of it is, unless you are pleading insanity (and considering some of the posts I've read on these forums, I have to wonder...), then you are on the hook for posting anything false, especially if you are posting doctored photos of blue grapes 8^o