[aaronbrethorst]

'We are not subject to any sort of federal order that requires us to turn over data, as described by Glenn Greenwald' would be a nice place to start.

[benologist]

"We categorically are not making data available voluntarily or under duress to any government or company or organization."

Of course none of them can say that because they're all sharing stuff with someone(s) and who knows where it ends up - Right Media, Twitter button and ScoreCard Research are all on Yahoo's homepage and except the Twitter button, inside Yahoo Mail.