It says don't press but I'm sure you will.. =)
Ever thought why people break rules? One example is this game. You were already told not to press the red button but you still did. Why? Because it increases our ego. It is a subconscious effect that if we break rules we eventually feel good. Admit it you felt better you pressed it. This also explains why we humans like freedom. Put a man in a cage and he will decimate his enemies, unshackle his chains, cry at the wind for freedom just to get home..=)
Why did you press button? Now it won't stop. =)