alt Hacker NewsMy mom simply did not respond to emails from students. Or even her faculty. It worked fine for her, except many people considered it rude, but nothing bad happened otherwise. She had an office, an actual one, and whenever it was important enough, people went to the office.
The school should have fired your mom. Students don't always have free time that aligns with instructor office hours, and some issues are best addressed in writing. Whether they like it or not, communicating with students through a variety of channels is absolutely part of a teacher's job. Those who don't want to do it should find another line of work.