But, in all seriousness, I think it is a fantastic idea to make women feel more welcome in that field, as too many girls I know who are IST majors, or something similar, frequently talk about how they really feel that it's more of a "guys" area.
When people say "sexism," that's a big part of what they mean. It's not necessarily treating women as if they're inferior to men, but rather creating an environment -- sometimes knowingly, usually not -- where women don't feel comfortable or welcome because they are women.
Pinching butts, whistling, making sexual advances, hiring unqualified men over qualified women, etc. are all ham-handed ways of creating that environment.
But sexism is also embedded in things like our instinct to comment first on a woman's appearance, call them "girls" instead of "women," and constantly sexualize them in small and seemingly insignificant ways.
Not sure if they attached it 'easily', but that comment was squarely sexist in my book. Even if it was well intentioned.
"don't worry ladies its just craft like sewing a quilt"
they will be going on about how they have some "negro boys" in the next group.
I feel that even at my age, I am still a "girl" rather then a "women" personally.
The logo you're seeing with a needle is one from Etsy [2], who by the way, were the driving force behind (and are the primary benefactors of) Hacker School's grants for women.
[1] https://www.hackerschool.com/assets/logo_140.png
[2] http://kongscreenprinting.com/wp-content/uploads/2012/02/Ets...