I'm not quite sure what a prop would be for low social status women.
Its a prop for having a functioning brain. Other than the star wars and science fiction stuff (which I haven't seen at any tech companies I've worked at here in the bay), the rest of the props indicate that you have a genuine intellectual interest in the field.
We don't make fun of NASA for decorating their offices with space paraphernalia or claim it means a low social status. Frankly I'm not interested in people coming into this field who are stupid enough to think that people genuinely excited about what they do have a "low social status".
But it's very disingenuous to call engineering low social status these days. Wearing Star Wars t-shirts or talking about computer parts and technology 24/7, yes, that will still receive at least some ribbing, if not more, but that's not the same as being an engineer by day. In my recent social experience, reaction after someone asks "what do you do?" is pretty uniformly somewhere on the positively-neutral-to-impressed spectrum.