&gt; Facebook users can invite non-Facebook users by email to events, if they want to.<p>This stops after a while. Even when you stay a pleasant person, you&#x27;ll always be &quot;that guy&quot; requiring an extra action to contact. The social ripple&#x2F;ping of an event stays inside Facebook.<p>&gt; You want to be in their social graph, but not have a Facebook account.<p>In the ideal form this would be a totally open protocol (with backing of Facebook, Google, ... and W3C).<p>In the current form, I do not know enough about Facebook to suggest a good system. Yes. I want to be in their social graph, but not have a Facebook account or be under Facebook TOS. If that is meaningless at the moment, maybe we should make it mean something.