Social Networking Sites

I belong to several social networking sites, mainly because they are fun and a nice place to share ideas and thoughts with people all over the globe.
What ruins the true joy of such places is when a troll comes along and impersonates another user and tries their best to cause havoc. It's amazing how often they copy everything about the person they are imitating, including their profiles and pictures. You would think they would have better things to do with their time :(
What makes things even worse is when these trolls are reported over and over and over and the staff running the site does nothing. Maybe they enjoy having these trolls wreak havoc.
Rather silly, if you ask me :(