Spammers have found a way to add unwanted phishing and scam events to people’s Google Calendars without their permission. Here’s how to stop spammers from adding things to your calendar without your permission.
As detailed on OneZero by How-To Geek’s former Editor-in-Chief, Whitson Gordon, Google Calendar (by default) shows event invites whether the user has accepted them or not. Spammers are using the loophole to flood people’s calendars with malicious links and other derogatory text.
Stop Calendar From Adding Invites Automatically
One of Google Calendar’s default settings is to add event invites automatically to the calendar. To turn this off, click on the gear icon found in the top-right of the display and then select “Settings”.
Next, choose “Event settings” found in the left sidebar.
Locate the drop-down that’s labeled “Automatically add invitations”. Click on the arrow.
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Source : How to Stop Spammers From Attacking Your Google Calendar