No one ever fessed up to that (wasn't ME!).
In research-based institutions there are regular lab meetings, and their shared-use bitching is a helpful communication medium that increases the chances that trouble is mostly minor, can be repaired relatively easily, and that slackers get corrected in a reasonable amount of time.
In an undergraduate institution, there are no meetings regarding shared-use equipment. Moreover, undergraduates are left alone unsupervised in the lab for long stretches, and some equipment is only needed once in a blue moon. Equipment problems are harder to catch and correct in time.
I was infuriated but not surprised when I found this recently: