^_^ did you know that if you cancel a credit card, your credit report goes down? there's lots of tricky business they do!
i think it's really important for kids to take personal finance in either High School or College, cuz more and more people are going into debt. and not the normal kind, but like hundreds of thousands of dollars in debt. and honestly, it's not ALL their fault! credit card companies make the most money one people who can't pay! it's a damn shame, but it's not going to change any time soon becuz banks and governments go hand in hand. and, especially in America, all the sub-prime lending (an idea banks had to give people with bad credit or "sub prime" credit a chance to get a loan but with REDICULOUS interest and payment rates) is playing hell with the economy.
however, unless you can pay for your house with cash upfront (what my Darling and i would want to do... in our dreams) a credit card is a necessary evil... ^_^ and it's great for eBay!