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I don't think there's a way to just send a page to the printer without user invention, at least, I hope there isn't. Troll sites would be even more annoying.
That's exactly why no such way exists.
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Regarding not printing the URL on the page, that's browser dependant.
In practice, true, but CSS3 has methods for controlling stuff like that:
http://www.w3.org/TR/2004/CR-css3-page-20040225/
Not that any browser really supports it yet.