Ask HN: Is Googlebot signing up for accounts on stackoverflow?

Today I googled a random programming question, and this was the result in google:

http://i.imgur.com/5iRwd1q.png

Note the line "Please click the link in the confirmation email to activate your subscription."

Why would googlebot ever scrape this text, unless it signed up for an account on stackoverflow?

The page in question:

http://askubuntu.com/questions/562417/how-do-you-update-npm-to-the-latest-version