I once overheard a coworker mention that they've called out in order to play hooky with their buddies all day.
I have been on the job since last April. I have called in sick twice since then, once for food poisoning (not pretty), and once because my heart was going haywire (long story for a much later date).
The idea that someone can call in sick so they can hang out with their friends is just wrong. That is what days off are for.
Furthermore, it makes people who actually have a reason to call in sick, myself included, feel more guilty because now there is even fewer people on that shift.
You are paid to show up. Do that.