I'm a political science professor. I gave my students an assignment to write a paper about last night's debate. One of them copied posts on /r/politics and added them to his paper. What's the most entertaining way to let him know I realize what he's done?

When a student is caught cheating at the university level, aren't the consequences pretty serious i.e. permanent? It's likely his chances of graduate school will now be nonexistant due to a letter in his file or something. Even though that kid completely deserves what's coming, i kinda feel bad for him lol As a college student myself, who is trying to get into graduate school, this is no joke my biggest fear. I really don't know what the fuck I would do if something like that were on my record. Honestly, if I procrastinated to the point where I'd have to resort to cheating, I would much rather just straight up take a zero.