Those who run, run. And those who consider it Wolf have never run.
1)I didn’t read it that carefully, but I’m pretty sure there was no ban, but rather a strong condemnation. A ‘Ban’ takes on different meaning, and it shouldn’t be referred to as such if it wasn’t.
2)As far as I know, this letter was not spread outside of BMG. In which case it was simply Roshei Yeshiva telling their yeshiva their opinion – which is exactly what everyone here always advocates being the way to go about things.