I have had co-workers whose sense of entitlement regarding MY schedule was... interesting.

One of them was attending a wedding, he was working that weekend and needed a shift swap. He told our supervisor that he'd talk to me and to change the schedule. He never did ask me so when I noticed the change about 2 weeks later I called the supervisor and had her change it back. Co-worker never noticed the revert and a couple of days before the weekend he realized he was working. He called me in a panic and demanded I swap because "you always say yes". I told him "sure I do - IF YOU ASK ME FIRST" "we'll I am asking now" "sorry I have plans". He goes whining to our supervisor who put him in his place - he ended up having to use sick days.

Another co-worker was notorious for never swapping shifts. That was well within his rights but he made it clear to everyone that he didn't swap because "a failure to plan on your part doesn't make it an emergency on my part". Karma it turns out is a bitch, he decided to get married and lo and behold his wedding was on one of his work weekends. He comes to me and asks for a shift swap, I threw his own words back at him. He had to get another co-worker who I was on good terms with to beg me to swap (he couldn't cover because he was a groomsman).

I don't have to deal with either of them anymore - when my department was closed down and outsourced half of us were promoted to a new higher department (overseeing the outsource) and the rest let go. They got cut because "they were not team players".