Mozsy

I took over and built up some Ancient Ruins with a small, 3-story staircase going up from the ground for my newbie base. I placed a stupid amount of candles (40-50) all over the ground outside and on top the fences that make the perimeter.... Some nights, many 15-20 Drifters kneel down and repeatedly bow to the walls in a typical religious worshiping kind of way. Many times i can walk up behind them without triggering agro then kill them without them reacting or running away What the heck is this behavior?