Should I be worried by America's stupidity?

Sometimes when I go on unfriendable I see how some people are just truly retarded and most are immature as hell. I'm starting to worry that lazy America's that slack off in school are going to bring us down. I'm not a nerd or anything, or a goody-two shoes, i slack off sometimes and have some fun, but some people are just genuinely lazy and stupid. Should I be worried? There are alot of smart people that are out to hurt us.