Actually, no it doesn't, because people only need to see those buttons if they already have a relationship with the service in question. Example: I don't have

Actually, no it doesn't, because people only need to see those buttons if they already have a relationship with the service in question. Example: I don't have a Google+ account, so I don't need to see the +1 button. If you have a Google+ account, you would have a cookie, and thus be able to see the +1 button.