Meta HN discussion: this problem often crops up when people are doing "rate my startup" type posts. They want to post an intro blurb for HN people, so they can't link to the website. Does this smell of a feature waiting to be added to HN, or is it people using it "wrong"?
I agree that this should be discussed. One problem though is that it's not a problem in a normal web browser with a mouse, because it's really easy with a script or just a couple mouse clicks. It's just a problem with mobile browsers like the iPhone's.