I like the idea of having this tag be used for posting great content that females on hubski might find especially interesting. I personally dislike #feminism posts online because it rarely pertains to something I find interesting and, more often than not, is about girls fighting back or some drama-causing squabble. I like the idea of #grrlski because it's a bit less "our club" or strictly about feminism and more "women might find this especially interesting."
"feminism" on the Internet is generally "what men are doing wrong." It's a total drag - in the first place, because there's plenty of shit that men are doing wrong and, speaking as a man who tries pretty hard to not be a part of the problem, there's generally very little I can do about it. Add to that the fact that these articles tend to attract angry women who want to vent and you're left with an echo chamber with zero gender mixing. Women are at a definite, documented disadvantage in most every part of the world but turning any feminist discussion into a gripe-fest is about as effective for change as discussing religion in /r/atheism.