[imported_Jiraiya]

If we were to add bags that reduced weight, well there is many factors that need to be thought out. For example, do we just let a person only carry one bag? If so and you kill someone with a full bag while already having a bag, well that would be beat. So we would probably have to allow multiple bags to be carried. If we did that though, where do we draw the line? If I put a magic bag inside another and another and so on... well that could make things weigh nothing, practically. So we would have to make sure that while you can carry more then one, they cannot be put into each other. Also if you can in fact carry multiple bags then the weight they reduce should be rather low.

Multiple bags being allowed is fine, you just set it so that:
1. a bag cannot be put inside another bag.
2. a fixed percentage of weight reduced.
(This is so having 2 bags for ore/igs gives you no benefit over just 1)

This allows you to carry multiple bags without having to nerf the amount they reduce.

If it was added and you could hold several, they would most likely be made per item type. That way you could have your pvp bag and your loot bag, so you can hunt without worries of weight while readily able to defend yourself.
Well thats my thoughts on that at least.

Different bags for different stuff would be cool, as long as they arent so expensive it makes it stupid to use them. Like no one is gunna go hunting/pvp with a bag that costs 40k. Its just not worth it. 10k or so per bag I could see using that if they reduced weights by like 30% for hunting/pvp supplies, 50% for loots/resources.

That would definitely be handy for doing big dungeon runs like deceit, I'm always out of weight space in there.