Has anyone recieved spam in their Google Mail accounts from 'William Griffin' that comes in the form of an invitation to an event (in the Google Calendar sense)? If so, have you found that it's inserted itself into your Google Calendar (if you have one) even though you haven't accepted or declined it, but deleted it instead?

I received such spam earlier today, read through it, and rather than click "yes/no/maybe" deleted the invitation. Just a few minutes ago, I discovered that it had inserted itself into my public Google Calendar because it sent a text message to …