A trend I think we'll see in the next year: blogs starting to only allow comments that come through Facebook Connect or similar identification services. In my opinion, that would be a change for the better. People actually think about what they say when their name is attached to it.
I don't think so. The nutjob that apparently threatened Arrington did so on his own blog too.
I really dislike the attention this is gathering, mainly because it just furthers the ego of the few people stirring trouble.
You can never sacrifice liberty and personal privacy for pseudo security. Do you really want a system where you have to login to an internet terminal with your SSN and it logs all the actions you do?