Two related, but separate observations and the names I've attached to them.
Inverse Bridge Effect (Also, Rebel Syndrome) — wherein someone does something or makes a choice because everyone else is doing the opposite. Named from the motherly question "if everyone else jumped of a bridge, would you, too?" The inverse being "would you jump of a bridge because everyone else isn't?"
Examples:
- Refusing to use a Mac just because everyone else seems to be
- The near immediate urge to point out downfalls in what everyone perceives to be a Good Thing™, or conversely, to defend what everyone else is bashing (commonly in message boards)
Indie Band Anomoly — Suddenly developing a dislike for something previously liked once it becomes popular.
Examples:
- Seeking out alternatives to Google just because they're now No. 1 in search
- Nearly every emo kid ever
- Most social networking sites ("Oh, everyone's on Facebook, I use such-and-such now!")
- Indie Rock Pete
