The way I see it, and who cares what I think, is that if somebody says "This should be in Forum X" but also helps the person answer the question, for example
"How do I get Johto Starters on Emerald?" and they've posted it in the G/S/C forums, and somebody says "You need to complete your pokedex, and this should be in the R/S/E section."
But still, for every one person who does that, there are two or three who come into a topic and say "This can be closed now" or "Don't double post" and nothing else. Meh, I say straight bannings - the rules are there to be read, there's a giant picture in the top right corner of the forums. There's several stickies, many of which have been capitalised to attract attention, if the rules are broken - well then is there any excuse not to give them a straight banning? Will they truly be missed?