I don't care, but how about a compromise. We rope one off, and let kids destroy the other one. Do we really need two 6,000 year old dirt piles?
Or get a backhoe in there and build a brand new mound with no significance for the kids to play on and leave the others for research. Then, in 6000 years, people will be sitting around trying to figure out the significance of the 3rd mound and the culture that built it.