The phenomenon that happens when a celebrity dies and people who have never heard of them are devastated by the news, as if the bandwagoners knew the celebrity personally. Let's say in high school there was a kid that no one talked to and then he commited suicide. After this, everyone else was so upset about it and are mourning the kid they never/barely knew. It is usually to gain attention.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)