War Gaming, I would like to suggest that you dis-allow all mods.

Hambijon: Although I play with a vanilla client, I disagree saying modding should be illegal for WoT.  The mod community sometimes make things that actually get implemented into the game officially which just gives players more customizability when playing (damage logs, spotting/view range and draw distance on the minimap, etc).  I understand that there are some mods that may give a player a minor "advantage" but those will be met with bans.