Hi Carolyn,
Those are spam posts. Since they were posted as comments, and you had posted a comment, you got the email alert (along with many others). I apologize.
As our moderators often do, Emma MacBeath spotted and hid this message soon after it was posted. It's now been deleted. But the email alerts were sent.
We are probably going to end non-member posting in G2G. This will reduce the spam problem significantly.
Chris