Profanity in film and TV - what are your thoughts?

I'm not bothered by it, but it can be overdone. I noticed this on The Leftovers, a series I otherwise liked, but the characters kept swearing all the time. It also feels unrealistic if it happens in the workplace. Would a mayor commonly use the F-word when talking to people? Would a superior tell off his employees by calling them names? I've never experienced this in real life. In fact the only area of real life where I have come across excessive profanity is in sports. I've known some really foul-mouthed coaches.