BadIdeas are things you JUST SHOULDN'T DO!
Someone told you to 'rm -rf /'? It's probably a BadIdea.
You found a candy bar on the footpath and want to eat it? Chances are, BadIdea.
You want to see what would happen if you put your finger in your RJ-45 crimper? You guessed it, BadIdea.
Remember kids, JUST DON'T DO IT!