People look down on people who clean up after them sometimes, instead of appreciating them for giving them a nice place to work. Or maybe because she doesn't talk to anyone that creeps people out, being too quiet...either way it sounds mean. You should talk to her one day, ask her how she is, say she does a good job cleaning up for everyone!
People are just a$$holes who call others creepy ba
hmm...could be her appearance. it could be that your co-workers are sissies. sounds like she intimidates them or they need someone other than themselves to pick on and draw attention away from their flaws.