Considering by the time you can complain about this they've already won the match I fail to see how it's cheating. Just seems like someone is butthurt they got owned and salt poured in the wound. So instead of just waiting about 20 seconds to revive you'd rather exit and spend silver or wait 15 mins just for the illusion…
Unless they changed things again,with MoP they gave characters a base of 40% damage mitigation from player attacks and the resilience on gear stacks onto that base