If you are smitten by this, first of all do not decline the invite to get it out of your calendar. It will notify the sender, telling them there is indeed a live human on the other end. For those looking for at least a temporary fix:
<a href="https://www.macsparky.com/blog/2016/11/how-to-fight-calendar-spam" rel="nofollow">https://www.macsparky.com/blog/2016/11/how-to-fight-calendar...</a><p>I can't imagine that this isn't a hot issue for Apple right now. It breaks a lot of the trust in iCloud IMO.