This website can be inappropriate at times, but thats only when people don't do the right thing and report offenders. If you become best friends with the "Report Player" button, you will be good to go. You can make fast friends and dress your avatar the way you want. No "membership" limits either.
Most people who start playing this sight end up addicted, and unable to get off of it. Most people who get off it - if the do, that is - end up depressed. Most of the people on the site have depression and suicidal thoughts. I'd recommend it to people who are 16, and need someone to talk to who are in the same situation, sometimes they have good advice. I wouldn't recommend small children on the sight.