Yesterday, my co-worker arrived to work and said, I don't feel well. I'm going to go home."
This is a woman who has an hour or more commute on Sundays. I asked my supervisor, "Why didn't she just call? Did she really think it was better to come in and leave?"
So, instead of yet another sick call-in, you'd rather turn around and go home. Not work an hour or two and leave, but leave after 5 minutes.