They should add a button for when youre real befuddled by something that still warants some kind of response. Like a "what the hell are you on about" button of sorts.
I believe sentiments more complex than the available buttons are precisely what the comment section is for!
In that case id be replying to just about everyone with some iteration of "what the hell are you on about?" Hahah.
And I say go forth. They need to hear it.