Couple of things:
1. Are they literally trying to ban a word or do they actually mean people should refrain from using it?
2. "Bossy" is gender neutral but is often used in a gendered way. In other words it may be applied to women more often than men, or applied to women when they show the same leadership qualities that are expected of a man.
Seems to me that not using the word, at least in that way, isn't a bad thing at all.