this isn't about 'on-call' or 'expectations.' Eg, I'm currently looking at a work problem casually (it's about 11 PM) because I have some time and I'm curious,

this isn't about 'on-call' or 'expectations.' Eg, I'm currently looking at a work problem casually (it's about 11 PM) because I have some time and I'm curious, so I can slack off tomorrow at work. Win win.