I think we can all agree on this?
(Well, unless you live in India. In which case, you can of course call them as sacrilegious as you wish.)
It's not so much that hamburgers might be delicious (although they are) it's the pleasure of taking a picture of it, of feeling that you're gaining fat in a way so worthy of the pain that you'll have to sweat at the gym afterwards, it's about how you're being so effin' TEEN and GOSH and everything while eating it.
Pizza and hamburgers. That's the culture we live in. Let's revel.