It wasn't simply the morally reprehensible position. It was also the act of impersonation. The bot identified impersonation.
I do agree that "They broke the rules" might not be a good justification for further rule-breaking.
As CalChris said:
>If you are going to dismiss impersonation on such an ephemeral platform, why do you care about spamming?
Maybe you didn't read enough of the replies to understand the context. I don't know.