A Report SPAM button on calendar invites would seem to be in order, so I don't have to manually delete each of these from the same address, and so Google can ban the offending account quickly.
The fact that we now need a spam button on our calender is ridiculous.
How long until advertisers pay <calendar provider> to add events to our calendars such as take Mom to <resturant> for Mother's Day, Watch <movie> on its release day, Go To <store> on its grand opening, etc?
(Please take this as a warning, not a "feature" suggestion.)
there is one, and it works exactly like that. A single spam report kills all of the events from that sender.