Bug 1024507: Measure use of Twitter and Facebook

<strong><em>IMPORTANT:</em></strong> After merging this, please remind me to update the client URL of my Facebook application. At the moment, to aid in testing, the application accepts calls from developer-local.allizom.org. Changing this takes no time, so if this merges while I'm on PTO feel free to just shoot me a text.
Interesting. Where could I learn more about that perspective?

I think <code>id</code> is semantically appropriate in this case. The name <code>social-account-research-notice</code> uniquely identifies this element. <code>social-account-research-notice</code> isn't a class of elements because there are no other elements that could be categorized that way.