Quite simply the rules state that no 'anti-___' social groups be established, this rule was 'ported over from the clubs forums here at PC anyways. I'm surprised that the staff members who did that had enough of a sense of humor to simply change the name rather than slapping you with an infraction or deleting the group entirely. :<
I know from personal experience how vexing and frustrating the staff members can be here, but they're by no means as bad as the Serebii staff. They're usually a lot nicer unless you put 'em into a corner or do something that obligates them to take action. (Like ignoring the rules) I highly doubt that they ever infract and mean personal damage to you, or intend to offend you. They are merely doing their job.