They are still playing by the game rules.
No, you aren't playing at all. You are using a third party program to gain access to something you haven't earned access to. It's cheating.
Its no more cheating than someone who bought a character on WoW.
Hey dumbass...buying characters is against the WoW EULA and is considered cheating. If they can prove you "bought" someone elses character/account, they have every right to shut down that account. Try reading next time instead of making up shit.
The number of achievement farm servers and the achievement hack is pretty solid evidence valve screwed up the achievement weapon link.
So I guess servers that limit class usage in TF2, DoDs or weapon usage in CSS, or disbale friendly fire, or alter the amount of health you start with, etc, etc, etc...this all means Valve screwed up too?
God some people are just freaking retarded.