Not allowed, as if Eggman himself ever actually followed that rule. What a hypocrite. Besides, Zero was no random upstart trying to cause trouble. Matters of security was, in fact, his job.

"To protect people from that monster," he seethed, "I'll do whatever it takes."

Some people simply couldn't be reformed. They'd keep coming back, spreading pain and hate each time. Just like Dr. Wily, Dr. Weil... defeating them wasn't permanent enough.