iCal spam
An item was spammed into my iCal and I cannot delete it. I am told only the "system admin" (who that?) can do it.
This seems to be a new occurrence as of last week or so - there are multiple websites with detailed instructions on how to deal with those. See e.g., http://osxdaily.com/2016/11/26/icloud-calendar-spam-invite-stop/
