Here's a practical reason if moral reasons don't work for you.
If calling them at 2 am for some reason doesn't get the business result you want, and you have to go to court, the court'll ask you what reasonable steps you've already tried to resolve amicably, and the judge will think you're in the wrong when your opponent brings out a log of your 2 am calls to their residential address. Suddenly it'll look like they were just doing legitimate business and you were threatening and harassing.
Even if you aren't a moral person, it pays to do things properly.
> Two wrongs don't make a right, and it certainly may be imprudent to escalate
The root of the hacker mindset is looking at alternative solutions that go against the common narrative. It sounds like this method worked out for OP, so it is worth considering. I don't think I personally would go down this path due to possible complications, its utter pettiness, and the fact it is very easy to silence phones at off hours. But depending on the situation, maybe it would make sense.
I am a very moral person, hence having thought these things through. You're the one taking the shortcut of assuming anything done through "proper procedure" is moral. In my book, calling the cops on someone is most certainly escalating the situation and causing them personal stress. Deferring to the system is not an absolution from moral reasoning.
If calling them at 2 am for some reason doesn't get the business result you want, and you have to go to court, the court'll ask you what reasonable steps you've already tried to resolve amicably, and the judge will think you're in the wrong when your opponent brings out a log of your 2 am calls to their residential address. Suddenly it'll look like they were just doing legitimate business and you were threatening and harassing.
Even if you aren't a moral person, it pays to do things properly.