There are services that are needed immediately, like water or gas leaks, there's not much time you can waste with those, but when it comes to your department, I don't think I'd call at 9pm on Friday. I don't call anyone at that hour, except if it's really life threatening emergency.
I have a neighbor who has the habit of texting at 9.30 pm or 10pm, but I never reply. I told her not to bother me, but she can't seem to understand or care, so I'm teaching her by not replying.
Yes, I know people like that too. It's funny because they always want to have a full on conversation too. It's not just a quick simple thing.
Well, my time is mine alone and it's up to me how I use it. These people need a good lesson, to wake up and respect people's private time. It's rude to call or text at that hour.