Twice. Once because I took 2 days too many off of work when my mother passed away from cancer whilst in the middle of the school year when teaching.
Second was when I was a supervisor at a production facility and I had my set schedule on 2nd shift when I was training. My manager and I had talked about my training and I was to be done by 1130p-12a each night. There came a day when a supervisor had schedule vacation that was on the calendar for 3 months. Manager comes up to me when I first come on shift and says I have to stay until 3am (the next shift coming in) because the supervisor was out. I reminded him of our conversation about the time I could stay late. He just said okay and walked away. I stayed until midnight and left (there was another supervisor on shift who also knew my schedule). I had 2-3 days off and came back in for my regularly scheduled shift start time. Got called into plant super's office....super, HR lady, and manager are in there. HR tells me that it may not be working out after all and that I probably shouldn't be there anymore. I said, whoa, what? you guys reached out to me about this job, I had also talked to my manager about my end shift time, and this was already talked about.
Super starts going in about how "we need to work as a team and cover each other and if we have to stay, we have to stay!"
I said, "so, when I have it in text and email from my manager that 12a is my end shift right now, that doesn't mean anything?"
"Well, I mean, sometimes things happen and we have to help cover last minute!"
"So.......................his vacation has been on the calendar since before I started here (6 weeks prior), you're telling me that him being gone was last minute?"
"Well, I mean, uh, well......"
"So, you're telling me that my manager is a lying sack piece of shat worthless corksucker or he's so incredibly inept that he can't manage the vacation schedule and is thus verily screwing someone else over because he can't do his job? What are we saying here exactly...?"
HR Lady: "yeah, this probably isn't a good fit...."
Me: "Oh, you are definitely correct, it's not a good fit because I don't fit in with worthless sacks of crap who lie and weasel about things when they're proven wrong and inept so it screws me over. I'll leave my stuff on the manager's desk. Unbelievable."
When unemployment called a few weeks later asking for some more details on the situation, I filled them in. The guy on the phone was silent for like 30 seconds and just goes, "dang, what the crap dude!?"
I goes, "oh yeah, like I said, I have texts and emails from manager confirming the schedule and how i was good to go, etc."
He calls back a few days later and goes, "they didn't even try to contest the unemployment....they know they f'ed up in all directions."
About 2 years later, I saw one of the fellow supvs at a chinese buffet and was talking with him. About 6 months after I left, the manager got canned, then 6 months after that, they got bought out by another company and the plant super and HR lady were both canned because of how inept they were.