I'm really sorry to hear that you're receiving reminders for spammy
events and seeing these events on your Google Calendar. The team hates
spam just as much as you guys do and we're working hard to keep it out
of Google Calendar.

If you've enabled notifications for "New invitations," you can
configure your Google Calendar settings to only show events you've
created or accepted:

1. Click on "Settings" at the top of any Google Calendar page
2. Select the "General" tab if it isn't selected already.
3. In the "Automatically add invitations to my calendar" section,
select "No, only show invitations to which I have responded."
4. Click on "Save."

In the future, you can also report any cases of spam by going to
http://www.google.com/support/calendar/bin/request.py?page=&contact_t...

Thanks for letting us know about this behavior.

- Becky