Is it weird to be using my mobile data for my home computer 24/7

I have some pretty bad home internet, and whenever it didn't work I would just connect my computer to my phone through a hotspot. Eventually it got so bad that I just started using it 24/7 as my normal internet. I would get messages from AT&T saying that it was limiting my data power, but it didn't seem to make a difference. I am also downloading things on my computer using my phone data. Is there any reason to stop doing this?