The ones that you dig out of the ground with your shovel. I think they should be removed because they kill countless newbies per day. It's kinda dumb that you have to wear heavy body armor and have a weapon ready to dig holes in the ground. I remember their previous purpose was to prevent people from standing in one spot and digging forever... but now it just an annoyance to new players progressing through their early hours of play time. Hell, if I were a newbie on a trial account and I suddenly got one-shot by something coming from a hole I was digging, I'd quit right then and there (after some inappropriate language anyway).