How is this disgusting? I'm pretty out of the loop with social media. But I'm assuming the major networks have the concept of a "private" profile. And I assume that such profiles wouldn't be available on this service.
If I'm wrong about the existence of private profiles, then the problem isn't this service. The problem would be publishing information publicly that they wish to remain private.
I guess I find it slimey in the sense that when you update your profile, you're usually not expecting the old information to follow you around. Someone may remove information because it hurts their career (e.g. removing information that can reveal your age). Or perhaps they've switched careers and if someone sees that it might be used against them. The point of using LinkedIn for an employee is to help sell their self. Would they use LinkedIn differently if they knew these changes would be tracked and potentially betray their intended use of the platform?
Of course you and I know better, but I don't think most people know their digital lives are so easily tracked and sold.
If I'm wrong about the existence of private profiles, then the problem isn't this service. The problem would be publishing information publicly that they wish to remain private.