It's not that I necessarily disagree with the goal of attracting more female attendees, but as a girl (and maybe I'm just speaking for myself,) I don't feel like I would be "tipped over the edge" by a demeaning pink "Girl ticket."
No need to talk about the max three people with epicene names and faces who maybe could have abused this, they don't matter.
Using a generic ticket for every woman is more simple than assigning a name to each ticket... so no.