Riding in the battlefield

So I was riding South Mtn Emmaus yesterday afternoon amidst gun shots in the distance. No worries, nothing new being from a similar hunting crazed state (Michigan). I did notice that near the top of the trail, probably less then a mile before the short downhill run on the service road for the power lines that the trail was blocked off. A few young but healthy trees were bent over to block the trail, something that was obviously done by a person. Are there parts of the trail that we shouldn't be riding on? Does anyone know about this?

Furthermore, which trails are "in the line of fire" and which ones are "peace zones" right now?