I'm still not sure how I feel about these things, but it definately feels like there is a lot of potential for abuse practically built in to them. On the bright side, at least you can turn them off, but on the other hand, it could end up being one of those things where you really need to turn them on in order to interoperate, so yeah, I remain on the edge.
In any event, it's worth a read if you're into that sort of thing.
