> Every patch since Lich King, though, has attacked these reverse engineers on the technical front by adding layers upon layers of obfuscation to the protocol.

I haven't seen such obfuscation, personally. Mostly design/implementation inconsistency, which, can happen to any large, old software project.

The biggest nastiness I personally witnessed was the battle.net authentication system upgrade, and it wasn't borne out of anti-RCE efforts.