The man is my hero of the day. As he noted -- if all you all missed it -- "at least allow us to opt out of these intrusive calls." That is common politeness.
As I recollect there are laws against robo-calls outside of normal waking hours.
In ours, the emergency notification cards come home the first day of school and parents indicate the phone number(s) to be used for contact. Here's a chance for parents to have those emergency calls go to their ... cell phone.
I would venture a guess Mr Lawyer has the missus take care of filling out the school forms and such, all he needs to do is call the school office or go in there and change his emergency notification form ..but look how much time he spent instead getting some petty "revenge". He is a dick.