Actually, dolphins do use tools, http://en.wikipedia.org/wiki/Tool_use_by_animals
Of course, they don't use EM transmitters and receivers to look for others like them in the far reaches of the universe.
We, on the other hand, can and should.
Lawyer: "Excuse me, but what are you doing?"
Homer: "I'm writing a song!"
Lawyer: "Go ahead, but don't use A-flat or G-natural. Those notes are owned by disney."
Homer: "Awww..."
Lawyer: "That's A-flat!"
Homer, on the same note, but rising: "Awww..."