It isn't creepy, I like the idea of following Celebs, like people say it's just like twitter, and I don't mind if people were following me (but I'm not a celeb), it's nothing like being followed down a dark alleyway in real life and if people don't want
to be followed on Xbox Live they can disable it in the dashboard settings.
It all depends on how the Feed pans out when you have hundreds of gamertags you follow. I follow around 100 gaming related twitter accounts and it gets pretty time consuming going through it all. But the way it seems, it looks like it'll show when they
start a game/app or uploaded a vid, didn't see anything else. So I gather it won't be that cluttered. I do like how it'll show what 360 players are doing as well.