Abuse of PvP in the neutral zone

Player for the Horde under the nickname Kineezz many times killed me, other players and low-level quest characters while on neutral territory-Tanaris, Gadgetzan

Proofs:
https://ibb.co/4KZ0Jsr
https://ibb.co/WWvyr2y
https://ibb.co/5c2VcLy

This isn't against the rules as far as I am aware, Gadgetzan is a contested zone, so PvP can and will happen.

But judging by the dudes health being 18k, and the amount of damage that the Gadgetzan bruisers do to the player that initiated the fight, they most likely killed him.

that's allowed.