The friendly spawned, saw a zombie, rushed to the closest house (mine), pried off my plank barricades on a window, jumped through the window, started reading all of my magazines, then proceeded to run around my house yelling "take that!" and destroying my shelves.

He then destroyed another barricade on another window, jumped out and then I finally had enough and killed him.

Is this normal or something I can changed in the behavior settings?