Nope, I even had one of those it was in maintenance. I had a set list of daily, weekly, monthly tasks , as well as w/e can up in between those, and on call certain days on a rotation with the other guy. As soon as our work was complete we could clock off and just go onto call frte remainder of our shift instead of mill around doing nothing waiting for a call. But with weekly and monthly routine maintenance tasks to do it was usually only a few days a week that we could knock off early and just be available if needed.

Then all of a sudden the manager got all whiny, "I have to be here mywhole shift , why don't you guys" blah blah blah. Fucking cry baby.

Anyway I refused to follow their orders of staying till the end of my shift until I eventually was fired. Because I was following the shift I was hired to do, and given no valid reason of why the shift needed to change, other than some butthurt sack of shit.

So the tl:Dr of that is it might start that way but eventually some piss baby is going to get it changed on you.