As they struggle to salvage some semblance of a campus experience this fall, U.S. colleges are requiring promises from students to help contain the coronavirus — no keg parties, no long road trips and no outside guests on campus. No kidding. Administrators warn that failure to wear masks, practice social distancing and avoid mass gatherings could bring serious consequences, including getting booted from school. Critics question whether it’s realistic to demand that college students not act like typical college students. But the push illustrates the high stakes for universities planning to welcome at least some students back. Wide-scale COVID-19 testing, quarantines and plexiglass barriers in classrooms won’t work if too many students misbehave.