So can we just assume that everyone makes fun of Crossfitters (except themselves, of course)? 

Yes.  Every Crossfitter I know is weirdly obsessed with the crossfit program and with their bodies.  They can't help but post about their workouts on facebook (burpees?  Who else but another crossfitter cares how many burpees you did?).  And they love to post before & after pics of their various body parts.

Of course, some people think "Every runner I know is weirdly obsessed with running and with their bodies."  I guess we are all obsessed with something.

I've heard there are some trail runners who post their mileage DAILY?

Oh, wait, that's us...

Bunch of weirdos! I heard some even talk about how much they eat, exchange recipes on running forums and look at porn on the same forums.