I was 14 and saved up a bunch of money to buy an NES game (like two or three months of allowance!), and at Toys-R-Us I picked Ikari Warriors 2. (Since the first one was actually good!)
After having the most disappointing Saturday afternoon ever, I tried to return it, being denied by the policy.
Well, my little smartass self watched that 'Fight Back' show of the time, about consumers winning and what not, and I rode my bike to the local courthouse and found the office where I could file a small claims lawsuit. I think it was the local 'consumer protection' office.
There was very nice employee there willing to help me out, I guess he thought this was interesting - or maybe he was just impressed/amused that some kid rode his bike to the courthouse to file his own lawsuit. I imagine it was pretty hilarious!
Anyway, Toys-R-Us corporate ended up sending me a letter saying they will give in and gave me store credit for the game in lieu of the court case 'this one time'. Good enough for me!
Sadly, I can't even remember what game I got instead! But I do remember my parents being fairly proud I took on this task on my own. Only lawsuit I was ever involved in, and I was just 14 years old!