Well, sure. I guess it can be a rule. Honestly though, I only reply and give CnC if it surprises me in a way. If it looks like something I see everyday, I wont feel like giving CnC. It's a good rule, and it's been suggested. But I also recommend that you guys slow down a little bit. It may not look like much, but making an honest comment on artwork of any kind is hard. You have to look closely at the artist's flaws, and that can be quite complicating.

And making it more of a pain in the ass is when the person repeatedly posts replays, making it a lot more complicating.

You get what I'm sayin'?