Have you ever seen a glacier before? In real life?
In case it wasn't clear, my post was sarcasm. I realize that sarcasm plays badly in text forums and on HN in particular, but it's the best way to express how angry I am that the US government is so utterly deranged when it comes to science.
So no, you cannot assume these things are sarcasm unless you are perfectly willing to just mis-categorize all crazies as "just sarcastic".