University of Oregon students are believed to be responsible for immense number of abandoned items and piles of garbage left at a campsite in California’s Shasta-Trinity National Forest.

Cleaning up after ones’ self is generally a common courtesy, but when the place being trashed is on federal land, it’s actually the law, notes the Oregon Live.

On Sunday, park rangers in Northern California discovered an immense number of abandoned items and piles of garbage at a campsite in the Shasta-Trinity National Forest.

While the perpetrators remain unidentified, there were clues suggesting they may be students at the University of Oregon, and likely involved in the school’s fraternity and sorority system, reports KEZI