Of course if an individual is being abused that's a good reason to leave if you're gonna leave, but my "you're autonomy" philosophy stretches even further than that. Of course someone should value having a life where they have simple necessities that common folk would "need" but that doesn't mean they shouldn't venture out sooner than 18. What surprises me is that no one mentioned the graduating high school factor. To be honest, at 16 or 17 or even 12, that was my main concern about leaving home. I know that a college degree is if you want that career right now, but a high school degree is the basics. However, if someone is comfortable with not having a high school diploma, then just leave. Seriously. Maybe you've only had normal fights with your parents, so what? If you know know know for a fact that you've got the mind of a 30 year old and not a 16 year old or 3 year old wannabe-traveler whatever then maybe you really should set out. See if you know know know that have that mature mentality and you can handle being out on the road, or at least you seriously feel ready, then do it. Of course there will be legal shit, like "don't get caught." So there's the main drawback. Well, uh, yikes. But if you wanna try to bypass that legal bullshit then go ahead. My main deal with not traveling (well generally) was the high school diploma. I was 17 for several months after I graduated high school but I was going to seriously leave home at age 17 after graduation and I guess that's different from being 13 or whatever the fuck age you kids have these days, but you get what I mean. If I were to regret one thing about my life it would honestly be not leaving years ago to travel. Oh and I was a smart, nerdy lil kid so I have every right to say that.