Ouch, reminds me a little of the “griefing-as-a-job” described in Charles Stross’ novel “Halting State”. Some people must have had a really pitiful childhood to find that kind of activity fun…
Probably have had more luck getting an immediate response from the community team had this been on their radar before 20:00 - 20:30 Friday (Durham), 2:00-2:30 am (Oslo) Saturday, though.