I'm usually fairly permissive - but I've been really annoyed by the social reader stuff. I'd normally have no problem authing the Washington Post to allow login or whatever, but I do not want them broadcasting every time I read a story. Mostly because I want to personally curate my feed, and always have. Maybe I'll get over that, but I kinda doubt it. Spotify and all games have this problem too, and even though I know it will only be showing up in activity box (for the most part) I've still greatly curtailed my listening. The privacy thing is secondary, but still important, I'd just not read about X embarrassing thing on the WP (which I most likely already don't).