They did roll this back after people got annoyed with the change. The fact that it was added at all though is very silly! Why should it matter to the project maintainer what some user is doing? Why build a community on a platform that is going to inject such a wildly silly opinion on you? If you don’t think EM Dashes are an issue, you have no choice but to be endlessly pinged every time an EM Dash is detected by the system if you’re a community admin.