I've been using meez for two and a half years now. I'll share a little of my experiences, and what I know about the site.
Meez itself is a PG13+ site (meaning, it's aimed at users who are 13+, and users under the age of 13 are not allowed on the site). There two main sections of the site; a forum section (like a message board) and 'Meez Nation', somewhat of a miniature world composed of virtual chat rooms. In addition to this, there are also user profile pages and mini avatars which users can customize.
The forum section has various subjects in which users can post and discuss things, such as music, fashion, and sports. There are rules to using the forums, of course, which are more strict than many other forum sites. Rudeness, bullying, and bashing new users is not allowed, hate speech of any form is not allowed (this includes racism, homophobic hate speech, and discrimination against gender or ethnicity), and the use of explicit profanity is not allowed. There are built in filters to try and censor some of the curse words. If a user tries to get around these filters by spelling a curse word slightly different, for instance, they can (and should) be reported for breaking the rules so a site administrator can fix the problem and apply the appropriate punishment (often times warning or temporary ban). There is zero tolerance for adult content, and if any user is found posting or promoting such material, they will be permanently banned from the site. This also includes cybersex or sexual messages.
'Meez Nation' has various 'hoods', as they're called, each of which have different rooms. The rules in these rooms are very much the same as the forums, with an exception to curse words and rudeness (like namecalling). The reason for this is because of option to ignore users. If someone is being rude or cursing too much, you can simply click on that person's username and select 'ignore'. From that point on, anything an ignored user says will not show up on your screen. That being said, hate speech, cyber sex, asking for a person's phone number or address, asking for someone's account information, or being under 13 is strictly prohibited. Anyone found breaking these rules should be reported, which can be done by click on that users name and choosing 'Report Abuse'.
The profile pages are pretty simple; basic information such as age and the time a person joined meez is displayed. Additional information can be added by the user; things such as hometown, school or job info, and an open-ended 'about me' section. There's also a media box at the bottom of the profile page, where things such as pictures and videos can be added. It's important to note that the media box is modified via html coding. The forum rules apply to profile pages. Users can also choose from three levels of profile page privacy - public (everyone can see), friends-only (only people on a users friends list can see), and private (only the user themself can see).
And finally, there is the 'MeezMaker', where a user can dress up their meez however he or she wants. There is quite a variety of dress styles to choose from, ranging from silly costumes to real-life apparel (even some premium name-brand items). There are a LOT of items standard users can choose from, many of which are free, and then there are some premium items which can only be bought if a user is a VIP or bought with 'meez cash' (VIP and meez cash can only be bought via actual money). To say that some of the dress items are sexually provocative is going a little too far, considering the meez avatars are nothing more than cartoons and often times do not represent a user themself.
The Bottom Line: Meez is a great site for teens who are 13 or older *with parental guidance*. There is only so much websites can do. A lot of the responsibility, if not most, falls into the hands of parents. There are moderators (called mentors) and administrators who very frequently patrol meez to make sure things are safe for the users, but there's no possible way for them to be everywhere 24/7, or for them to know everything that every user is doing or saying. Parents need to step up to the plate and know what their kids are doing and that they are posting on any website. Meez has a lot of potential for users meeting new friends and having fun!