one day courfeyrac receives a snapchat with marius sneezing in the background and he zooms in on marius and makes that his facebook profile picture. he then shows grantaire, who logs into facebook for the first time in 6 months to make it his profile picture. joly and bossuet, who have him under close friends and therefore receive a notification any time he does something, immediately make in their respective profile pictures. long story short, in under an hour everyone in their immediate group of friends, with the exception of enjolras, has a photo of marius sneezing as their facebook profile picture.
cosettes is the only one with a comment on it, marius, 2:45AM: et tu brute?