Scribd added Facebook "Instant Personalization"

Over the weekend, I have received following tweet from Wired megazine:

@wired: Scribd added Facebook "Instant Personalization" this week. It's a privacy nightmare, says @pgcat http://www.wired.com/epicenter/2010/09/scribd-facebook-instant-personalization/

To summarize, Scribd have added a feature that add you and all your facebook friends as participants without your consent.

You are allowed to opt out, but the default is opting in.

And of course, there is not a clear, intuitive, easy-to-find way of opting out (apparently, there is an opt out banner up at the top).

So, what do you think about companies doing these default opt-in additional features?

This cannot be stopped legally, since there is a way to opt out.

However, this can be annoying and dangerous if more companies start doing so.