"Disintegrate into something unpleasant?"
Boy, have I seen stuff like that.
Person A says something on the FB-page of Person B. It looks like an insult toward B, but it actually is an inside joke between A and B and nothing more than friendly teasing.
Person C, who knows B, but doesn't know A, reads this and is not happy with this "insult". He doesn't know about that inside joke.
Person C starts to harrass Person A. At that point, Person A doesn't know why he is being harrassed on FB, by someone he doesn't know.
Person D, being A's big brother gets to know about the harrassment of his little brother. However, he does not personally know person B ór C, so he finds a picture of Person C, and discovers he (D) and Person C are actually in the same university.
Next day, Person D shows up on school, and C gets smashed in the mouth... by someone he doesn't know, and can't *fathom* why he would have a quarrel with him.
I've seen it happen. Nice... "social" networking
