It’s hard to imagine that just anything could have caused actor Kal Penn to leave his very-serious-sounding gig as associate director in President Obama’s Office of Public Engagement. After all, Penn had proven his political backbone when he chose the White House over House. But it’s not every day one gets to pump shotgun shells into Santa Claus and hotbox a baby — and so when the script for A Very Harold & Kumar Christmas showed up in Penn’s .gov e-mail account, it was sayonara Public Engagement, hello again, public endangerment.