We may have worked at the same shitty McDonald's as teens lmao. I once requested off one single day several weeks in advance, because I had some school trip that day and wouldn't be in the state. A week from the trip I looked at the schedule and saw I was scheduled for that day, even though I had it approved weeks earlier. I asked my manager about it and made it very clear that I would not be able to come to work that day. They told me I needed to find a replacement or I'd get a "point" or whatever they did to keep track of people's "fuck-ups". I told the manager that I didn't have a way to contact any of the other people that worked at that McDonald's because I had just started working there and didn't have any of their numbers. The manager went and printed out a spreadsheet of every employee that worked at that location and their phone numbers (probably without their consent), and I called every single person on that list. There were probably close to a hundred names (I think it was a list of literally every person who had ever worked at that location, past or present), but no one was available to cover my shift. Trip day comes, I got a point, and then was "quiet fired" a couple months later when they just stopped putting me on the schedule (except for after I submitted a two weeks notice, where they scheduled me for an 8 hour shift on my last day 🙃). I too have avoided McDonald's ever since then.