punish them by making them watch bad TV shows and movies; like Twilight, Hannah Montana, 13 Reasons Why etc.. Trouble is that's subjective, you kinda have to know their personal tastes
Lock them in a room with no phone, internet or TV, just an old staticcy radio that plays nothing but Justin Beiber songs lol.
reminds of the Black Mirror Christmas episode ENDING SPOILER: they punish a guy by trapping him in a. simulation to listen to a song on repeat for what feels to him like hundreds of years