On a more constructive note, report them to the Wrecker Barricade. I know they're not actually wrecking, but they're making the game unplayable for others so deserve to be reported.
I agree with you. I doubt many servers would ban for spamming, but I'm quite sure that an MPR showing purposeful disruption would be helpful to server admins in the process of making future decisions, determining a pattern of intent etc. Forewarned is forearmed.
I'll close the thread, now, since the admin's been found.