[Bazooka_Joe]

Dumpuser.

If you are the admin of the server, type in the rconpassword through the console, then type rcon status. This displays a list of all players in your game.

From this, you can choose a suspect of bad skins, and type rcon dumpuser "Players_Name". Use the quotes if their name has more than one word. THis will display both their Axis and Ally skin names, and you can see what skins they're using.

I suggest using Delator though, as it will do this job for you.