0k, I exaggerated with the title, but apparently Lake Mead has had an ongoing problem with Christmas for decades...
https://www.newsweek.com/lake-mead-rangers-end-christmas-tradition-11252413
"National Park Service (NPS) rangers at the Lake Mead National Recreation Area have signaled they want to end the decades-long Christmas tradition of Americans decorating the area's many evergreen trees. ... .. It is not clear exactly what year the traditions began, but it is understood they began after Lake Mead became a National Recreation Area in 1964 ... .. The rangers have said that they are "regularly" having to remove "debris" from the tradition to "help protect wildlife, preserve natural ecosystems, and keep the landscape healthy for everyone who visits." ..."