Related to this bug, some time ago I started getting spam on my Google Calendar. Not sure if Google ever fixed it, but basically Google would automatically add events to your calendar when you got an invite in your email. Honestly, it's a nice feature; saves a couple clicks every time I get an invite. The bug is that it applied even if the email was spam. There was no workaround, other than disabling the feature completely. Quite a pain. And yes, just like this bug, you'd get lovely "eat my pussy" events popping up on your calendar and reminders.
Thanks Google, you're the best /s