There's a point at which you stop being a creative hair DIY-er or a trendsetter and start being an idiot. Yes, the desire to be fashionable and/or funny has led many an otherwise sane and intelligent person down the road to ruin, and you'll only know you've gotten there when it's way, way too late. Just so you know, though, there are seven things that, if you do them, will not earn you any pity here. To see the seven unforgivable hair sins, just keep reading.