iv'e had similar done to me many years ago when I worked for federal express. I had the flu with a fever of 102.7 degrees, so i called out and went to the doctor, he gave prescriptions and told me I had "walking phenomena, and was dangerous"that I should not work for at least one week.I asked the doctor to write a letter of that so I could provide to my manager when I went back to work, after a week off, I was still sick but went back to work anyway, one week after that I started to feel better, and got called in to my managers office, she handed me a letter stating that I would be "let go" if I called out again, and that I was on "probation" and had to sign the letter. I worked for them for 4.5 years and only was 15 minutes late once, and called out only once before (for one day). Two weeks after that incident I quit. Another job, of 15 years, recently while my mother was dying, I asked to take off for a week to go see her, she lived far in another state, they made me go to HR prior to leaving for the week and write a letter of intent and sign it as to why I was taking off without pay. I was in tears writing that letter, shit media company well known in the US. Most people fault companies, it's the shit people that work there, I have found many higher up the ladder often do not know how bad managers and HR people treat employees.