How to prevent strangers from adding events to my Google Calendar?

A little change in your calendar settings would help you in avoiding getting unwanted invitations. Here are the steps :

1. Open your Google Calendar.

2. Tap the settings icon and go to ‘Settings’.

3. Under the section ‘Event Settings’ go to ‘Automatically add invitations’.

4. Select ‘No, only display the invitations to which I have replied’.

Now you only those events will be added to your calendar which are permitted by you.