LinkedIn is great. No recruiter could live without it.
Yet the new LinkedIn Endorsements section is not only worthless, but I think it could actually hurt! If you're someone who judges people on twitter by how relevant and influential the people are who follow them, then you know what I mean. How do you sift through all that to really make a good judgment call?
Endorsements are more like a popularity contest than a useful judgement of your skills and experience. As a recruiter, I often accept certain invitations to connect with people I don't actually know because having a big network is very important to my research. Yesterday I was endorsed by someone I have never even spoken to for my expertise in one area: B2B marketing strategy. I only added it because I thought areas of expertise may be searchable and I'd want to be listed. Maybe she was just testing how to use endorsements by randomly picking something for a person she doesn't know or care about.
You can remove a recommendation you don't want, but there's nothing you can do about a dumb endorsement.