Motorcycles are dangerous, everybody knows that. In fact, that's the reason why so many people think it's hot to ride a motorcycle. There's something about the complete lack of self preservation, danger, and rebellion that we feel when looking at a guy on a bike. But there's a line that can be crossed when it's no longer cool and rebellious to be on a bike and it's simply dangerous, scary, and reckless, especially when it comes to your teenager. One Redditor, a motorcyclist and part-time bad bo…