Losing your monuments

My wife's college-student nephews are part-time security guards at a major museum. There was a room-sized sculpture installation there that included a generous scattering of rabbit feces. Every night, these lads had to count the pellets - they are part of the exhibit.

Are park rangers inspecting the Civil War monuments in their parks daily?

Are they taking as much care of the memorials as the museum's guards are taking with scat?