[tablespoon]

> Twitter and Facebook are common carriers, not private residences.

Except they aren't actually common carriers. Some people are of the opinion they should be, but having an opinion doesn't make it so.

[a1369209993]

> Some people are of the opinion they should be

I think (based on this) that you mean they aren't legally recognized as common carriers (which isn't what I said, but fair enough; edited to clarify).