Too often trail users think it is their back yard.
But there is traffic of all kind--the worse are dogs on yoyo leash, 3 or 4 if not 10 year old riding all over, mothers with 2 baby carrier side by side and then large family groups who are behaving like gangs!
I avoid MUPs like the plague--unfortunately I live next to one and have to use it to get going on at least half of my rides!