Over the weekend, ecoterrorists struck in Washington State:

EVERETT, Wash. (AP) – Two radio station towers were toppled early Friday, and the station’s manager said an ecoterrorist group’s initials were left at the scene.
A sign bearing the letters ELF was found near the towers, said Andy Skotdal, general manager of KRKO Radio in Everett, about 25 miles north of Seattle. The Earth Liberation Front is a loose collection of radical environmentalists that has claimed responsibility for dozens of attacks since the 1990s.
However, Snohomish County sheriff’s office spokeswoman Rebecca Hover wouldn’t confirm that a sign was found.
A neighbor told a 911 operator that someone seemed to attacking the towers with a bulldozer at about 3:30 a.m., Hover told The Herald of Everett. A 349-foot tower and a smaller tower were found on the ground with heavy construction equipment nearby, but deputies and a tracking dog didn’t find any suspects, Hover said.
Deputies found other, unspecified evidence at the scene, Hover said.
The family-owned station remained on the air Friday morning after shifting to other transmission equipment.
KRKO’s plans to increase its transmission capacity have been embroiled for more than a decade in appeals and litigation over issues ranging from trumpeter swan habitat to potential health hazards to humans.