I hate ringing in sick, I doesn't matter how genuine I am, I always worry they won't believe me. I don't do it often but in my current job all you have to do is email the boss, who is fine about it. Thankfully I only had to do it once when I was in a car accident towards the end of last year and I was only off one day but honestly the guilt and anxiety I had even though I was being honest, was awful. I work for a great company though and everyone is respectful, its a good place to work, nobody takes sick days.
My previous job people took the piss all the time, One guy faked his own grandmothers death just because he had been on the coke the night before and hadn't made it to bed
I have worked in places late teens that would say no voicemails or texts, has to be a phonecall... then massive back to work disciplinary's etc when you did go back in.
Worked for Tesco when I was 18 and my manager was a real cow, one of our best friends committed suicide and I was really in a bad place because of it, I had told them I would be taking the Thursday off to go to her funeral which they said would be no problems however on the day off the funeral my manager rang and demanded to know where I was, I reminded her it was my friends funeral, she didn't even apologise for forgetting, just hung up the phone. I genuinely liked worked there and had made lots of friendships with both customers and staff so I was really sorry to leave.
I know some people seriously take the piss in regards to phoning in sick but some people are genuine and it just isn't fair to assume everyone is lying!