The rare times I was allowed to stay at someone's house, my mom called ahead and said I wasn't allowed to eat sugared cereal, and she'd send me with a sandwich baggie of "approved" cereal if requested. This was one of the MANY reasons I didn't sleep over much.
When I was about 12, I did some research and found Cheerios and Wheaties had sugar in them, and pointed this out in a moment of pure stupidity (the plan was to try and get Kix on our table, but this backfired). Guess what cereals I now had left until I left home?
I stopped eating breakfast around this time as well. I was *well* aware of other cereals my friends had growing up and the concept of toys and such, but sadly, to this day, all I can stomach for sugared cereal in the morning is Fruit Loops (thanks to my wife, who weaned me up to them).