What exactly is needed for someone being banned?

[Velocity2k]

In fact it's impossible to ban the WC3 key.

FALSE [only because you can't here => doesn't automatically need to mean that it's impossible at all (Blizzard can and do ban)]

-> we don't know the player-keys.

True (exception: every individuum should know its own key)

Thanks for repeating exactly what i just wrote.....

In fact it's impossible to ban the WC3 key. We are not blizzard -> we don't know the player-keys.