Maybe make the board's quotes somehow different? Like, you can't quote something from the no rules board and put it on another board, you can only quote/copy paste from No Rules to No Rules.
But somebody could still just copy the quotes from the rules topic li-
well i'll just show you; let's say you typed something in Off-Topic (The ruled one) then copied your quote, it will then look like;
[quote author=Muslim link=topic=238863.msg6812290#msg6812290 date=1375933394]
hi guys i liked bananas
[/quote]
i would copy that quote and only take
[quote author=Muslim link=topic=238863.msg6812290#msg6812290 date=1375933394]
[/quote]
and would copy all the links from the things I just talked about and paste it into there then spam it all over, and others would know the trick too.
Even that's not necessary. IF somebody quotes a post from No Rules section to another board that contains any inappropriate material, they will be banned.
you do realize it would take a while for an admin to notice it at a certain time though, and at the time it's removed people would still have saw it and be scarred if it was posted at the right time.
oh god lol