"Luko, mi estas via patro." http://www.falling-roses.com/Haunted_Hill/Motion/darthvader.gif
(I have to learn me how to insert images...)
A lot of them do, which then leads to endless bitching and moaning on Reddit and other places about "These sentences make no sense," or "These sentences aren't useful." It's a no-win situation. If they don't have the funny sentences in there then people complain the course is boring. If they put them in, it's not "useful enough."