M1GarandFan
Wow, Rob. You've convinced me beyond all doubt, that I'm thrilled I never got involved in WoT. What a bunch of gobbltygook. It's another entire language and sounds more like D&D than a war game.
I'm not familiar with the machinations of World of Tanks, but in the World of Warcraft, there are different servers for different styles of play. PvE or player vs. environment, are worlds where you can't even target enemy players unless they come into the opposite faction's cities and/or attack NPCs.
NPCs are non-player characters which are in game AI people that are vendors, guards, quest givers, etc. They are vital to actually playing the game by sending players on various tasks or are the target of the task. For instance, a farmer may ask you to kill the leader of a gang and get back something they took (or someone). You then have to kill a bunch of bad guy NPCs to kill their leader and rescue the person or retrieve the stolen item.
In a PvP world, an enemy high level player can kill all these folks (and you) and literally make it impossible to play in that area. At least until their moms make them get off the computer or they get bored. Waiting for lower level players characters to re-spawn is called "camping" and is bad form, but done frequently on PvP worlds.
In a PvE world, the enemy can still attack NPCs (usually called "grieving"), but can't attack you. But they normally don't go after rookie areas just to spoil the fun like they do in PvP worlds.
I've seen a few WoT forums where they think they know tanks and tank tactics. But they know them as well as I know sword fighting and archery from playing Warcraft.
Warcraft has a third style of world where people on the world attempt to mimic their in game character's racial traits and speech. These are called "role playing" worlds. If you play a dwarf or an elf, you try to talk and act like one in game.