The point is _not_ what you could have done, but what you did.
You annoyed this community again and again, have been told to stop your stupid stunts again and again, and now annoyed this community again using an automated attack. And since you have been warned to not do such stupid things again, it doesn't matter that you intended it as a joke.
The potential that this very same approach could have been used for a DoS attack only made it worse. The ban was and is a fair penalty, even if the approach couldn't be used for a DoS attack.
And you still didn't apologize to anyone.

cu,
sven