I mean, do you expect them to alter the laws of physics to your preferred taste? Most overhead installs must attach to the closest point on your home to the pole.
If their experience was like mine someone from the ISP showed up unannounced and just started putting a hole in their house. They then called the ISP to ask if this was legit, and the response was "we can't answer that for you, maybe you should call the cops".
In this case, yeah, it would be unprofessional and they'd be pissed :)
Yes, actually, I do. Not alter the laws of physics, but run the cable where it makes sense. If that means running it in a conduit outside the house for a few meters to get to a sensible spot, then that's what they're going to have to do. They don't just get to put a hole in your wall "wherever".
In this case, yeah, it would be unprofessional and they'd be pissed :)