C.A.V.E. is an acronym for Citizens Against Virtually Everything. CAVE people, often self-proclaimed "activists", oppose most any proposal for change within a community. Topics subject to their protest include new development, infrastructure changes, or public policy changes.
CAVE people will oppose a proposal entirely, instead of suggesting a change that could minimize impact. They are rarely open to compromise.
The local government hoped to construct a wind farm just outside town, but opposition killed the project. When they considered a ban on texting while driving, several of the same CAVE people protested that too.
See also: NIMBY