While using the facebook debugger, it complains:
Warning fb:app_id hasn't been included in the meta tags. Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog. Otherwise, the default app id( 966242223397117 ) will be assigned.
I don't understand why I have such a message, since I don't have an app_id for my website, and I shouldn't need why since I'm not doing any facebook connect or using any of their plugin.
Am I missing something, or is it simply that facebook wants to push me to create an app for my website?
If you don't have an app to associate the website to, then that warning can be ignored.
For an example of a successful website which doesn't have a fb:app_id included, you can run a debug on this stackoverflow page's URL within the Facebook Object debugger, you will see that it also produces the same warning message.
The posts themselves will generally appear the same as they are represented at the bottom of the debugger tool.