[afterthefact]

I don't see it as a problem in relation to society, as many people do, but it could be a problem for that individual, based on, as stated before, their motivation for doing so. If they truly are expressing themselves, or if they are just doing it because it's something to do and they just want to be cool (because, come on, who doesn't want to be cool, right?), then that is fine. But if they are doing it out of low self esteem and feelings of low worth, and they need that in order to feel in anyway normal, then while it may be a quick fix, it doesn't solve the problem.