OK, yes, under canadian law that's true. (And under Australian. Or British law for that matter.)SlainPwner666 said:30 minutes without a reply isn't really anything to get upset about.
On the topic at hand, yeah, it seems dumb to me, but I can't off the top of my head remember what manga looks like. I'd have to see the actual manga to make my mind up.
There really isn't much room for error, and if it looks pornographic, the customs agent can't just say "Well, this looks like child porn, but it's probably just some whacky Japanese comic so you go right ahead!"
But it should be trivial for just about anyone with a functioning set of eyes to tell the difference between a photograph and a drawing.
(And in that regards, bans on CGI depictions make more sense than those on drawings. If Final Fantasy is any indication, while it might not be 100% perfect, it's easy enough to create computer generated images that look convincing enough to be incredibly confusing, and difficult to seperate from the real thing.)
I guess it comes down to a question of indirect harm.
Because drawings are unlikely to be related to child sexual abuse, whereas photographic (or video) productions are in fact direct evidence of child abuse having been involved in creating the work in question.
While it's possible that a drawing was a 'life drawing' - that is, the artist drew something that was actually happening, it isn't very likely.
Therefore, the question that arises with any legal jurisdiction that treats such drawn images as being equivalent to depictions of child sexual abuse, (which it clearly isn't), is the
concern that these type of images might have the effect of 'normalising' the behaviour it suggests, or otherwise causing indirect harm.
Whether that is a valid concern or not is open to debate, but even then, treating it as equivalent to pictures of real children shows a disturbing mentality of a different kind.
As an aside,
If you're wondering why I'm calling it Child sexual abuse, it's because a UK group that deals with tracking these kinds of pictures finds terms such as child pornography, kiddy porn and such unhelpful - Well, in the words of the IWF (UK internet watch foundation - An NGO that keeps track of such content on the internet and helps remove it):
"Please note that 'child pornography', 'child porn' and 'kiddie porn' are not acceptable terms. The use of such language acts to legitimise images which are not pornography, rather, they are permanent records of children being sexually abused and as such should be referred to as child sexual abuse images."