I really wanted to play my Sega Dreamcast online (I think the game was Phantasy Star Online), but my house had no internet at the time. I was probably 12 or 13

I really wanted to play my Sega Dreamcast online (I think the game was Phantasy Star Online), but my house had no internet at the time. I was probably 12 or 13 and had all the time in the world, but no credit card or parental permission. I figured out how to reverse engineer those spam AOL and NetZero signup CDs you would get in the mail to extract their dial-in credentials for new user signups. I managed to use that to get free internet access for the Dreamcast! I think I got caught when my mom needed to make a phone call... online gaming was tough in the days of 56k dialup.