I think most people don't mind the occasional emptypost. I think people mind when we've gotten 13 pages in a day and there's shit all content to show for it.
I like to think about it this way. Imagine this place is a bar where you're hanging out with friends watching something together on TV. You're all chatting and bullshitting, and occasionally bringing up new information - but generally in a way to steer to a new conversation.
Now, the occasional emptypost is fine. But if your posting makes you seem less like a bar patron, and more like that one patron's down's syndrome son - sat in the back of the building with his own personal TV, loudly watching the same TV show he's seen 500 times before, only to occasionally turn around and loudly yell "GUYS, GURA SAID THIS THING, ISN'T SHE SO FUNNY" then turn back to the TV without paying any attention to what anyone else is doing only to keep loudly laughing to yourself - well, you might be an empytposter.