Only Humpback Whales "sing". But Belugas "vocalize". Huh?

Factual Questions
1

Do the songs of Humpback whales carry substantially more information than other sorts of whale vocalization?

This week’s Economist (1/3/2004) notes that, “Contrary to popular belief, only humpbacks, “sing”, and not much is known about their purpose in doing so.”

Ok, that appears to be true. However other whale species appear to vocalize, though they do not, “sing”. For example, killer whales appear to have dialects that vary from pod to pod. Right Whales call types have reportedly been correlated to various distinct behaviors.

Motivation: IMHO, a specie that may be capable of complex communication deserves special protection. So it interests me whether Humpback vocalization may be substantially more advanced.[sup]1[/sup]

(Reference: I couple of years ago, I asked, Language: If Whales had it, would we know?)

[sup]1[/sup]Of course it is possible, perhaps likely, that the Humpbacks are not reciting the moral equivalent of Shakespeare.

2

Personally I can’t see a reason for “special protection” of some animal just because it makes a sound, and protection from whom?

Is there any reason to believe they are cabable of complex communication? I’m no scientist but I’ve been around whales quite a lot and I fail to see the “magical talking whales” everyone seems to be so fascinated with. I’d happily reconsider if someone was to have a conversation with a whale but so far I just see them as big fish, really, and a pest at that.

Also, no offence meant but isn’t a specie a coin? A coin capable of complex communication, now THAT I’d support extra protection for…