[Edit: coldtea (or anyone else), if you think I'm wrong, feel free to try to state Derrida's position in a way that does not destroy itself, and we can argue about it.]
Actually, there is an idea that has been floating around other threads here, that Derrida sought to destroy structuralism by turning its own methods on it, thereby exposing its self-contradictions. If so, then he only speaks to those who are already engaged with structuralism - hence my comment elsewhere about closed self-referentiality. I have no idea whether this was his intent, but the thing is, it works anyway.
Quite the opposite, in fact. The disdain and desire to confound oozes right off the page.
That's because they are not supposed to be mentors and they don't deal with students (except nominally, in their academic capacity). They deal with adults.
EDIT: oh my god, HN filters out emoji codepoints, how utterly barbaric.
Anyway, it was going to be this dude: http://emojipedia.org/rolling-on-the-floor-laughing/
But this also holds for anything you write as well.
It's not like laughing at it makes it any less true.