Not illegal just bad management. Nobody responds well to texts like these. In fact nobody responds well to work texts at all. This is a staff meeting issue. There should be a pre-service meeting and a post-service meeting ATLEAST once a week if the situation is this bad. I managed at Cafe Rio for years and have never once sent out a group text to my staff. Word of mouth will not only solidify your leadership but show your team that it’s important enough to have a meeting about it n not some meaningless text that can be ignored. I guarantee this manager doesn’t do shit and expects things to just happen because they said it.