I think you should buy what you need and know what you can use. When they have toothpaste at dillons I want to go in with my TWO 50 cent coupons and get my 88 cent toothpaste for FREE because dillons doubles but anymore I go in and all the toothpaste is GONE because somewhere someone needs 30 tubes of toothpaste and that gives them a rush. Now I know some people donate these to homeless shelters and that is a GREAT idea but seeing that show on tv where it looks like people have their own little stores that bothers me. Maybe it shouldn't but I see it more as hoarding than actually saving. If I have that many items I am sure I can find someone who could use them more than me having 30 enter item here sitting on a shelf.
How does it affect the economy- well companies like it because you are buying their product with your coupon. Stores don't mind doubling because they hope you will buy other items if they can pull you in.
Some of you who want to start couponing may ask how do I get coupons- best answer if you know someone who gets the Sunday paper just ask if they use their coupons- we have never bought a Sunday paper but we have family or friends who are willing to save them for us every week. Get one or two of these people and you are pretty well set. Another GREAT place to go is to the recycling center and look through sunday papers. Somedays you will find some someday maybe not but it's worth a shot.