My dad does stuff like this. My mom not as much.
Being restricted to their phone hotspots, I'm always dependent on them being on. My dad knows this, so when he decides in his own mind that I'm done with the internet, he just shuts it off without telling me. Last time I asked if he could put it back on, he just gave me a belligerent sigh and said that "it wastes battery". My mom is usually good about it though and will tell me when she needs her phone off, so I don't even ask my dad for internet access anymore.