I thought this was a clever way to get people to sign up for a google account if they didn't already have one for mail/voice/youtube/etc. The background was an

I thought this was a clever way to get people to sign up for a google account if they didn't already have one for mail/voice/youtube/etc. The background was annoying, but if you wanted to change it, you had to create an account and use your own photo. Then it leaves you logged in, and they get search histories tied to individual accounts. That's probably just paranoia, but seems like a side-effect they won't mind even if it wasn't their main intent. It's also part of the reason I won't stay logged into people's free webmail services after I'm done reading my mail, though.