The eventual solution Google and Microsoft were forced into is: search providers are browser plugins.<div><br></div><div>Switching focus to iD: there would be list of "post edit notification" plugins one could drag into place.</div>
<div>Facebook, Twitter and G+ would be among those, along with whatever open source version you happen to track down or create.</div><div>Anyone not wanting to be reminded of Mark Zuckerberg's smiling face could simply fail to install that plugin.</div>