This is my favorite quote from the comments:
"Ok ..Not to over simplify things here, but what we are looking at is a simple sign to indicate where to pee. ( I really don't care if a "woman" wants to pee in a "men's" room or a "man" wants to pee in the "ladies" room. And yes, I have trans friends.. )
This is just a simple sign. What is the proper answer to the issue of making a sign to indicate the two choices ( and yes i know that some think there are more than 2 genders, but in this world we cant have a bathroom for everyone, so sticking with just 2 covers most of the world)
Keep in mind this sign needs to be understood by folks who either cant read , or those to blinded by a dire need to pee, so it has to rely on a simple visual image. Here we see an attempt at humor I believe, rather than jamming a binary down anyone's throat.
And lets speak to the assumption that men are represented as people, and woman as skirts. Is it possible that the simple pictogram might be showing men in pants, or men without a penis dangling..
I am truly sympathetic to the causes of those of non traditional gender, but this is a silly waste of time, attempting to make a bathroom sign a political statement is pointless. I'm sure that catering to the masses shouldn't be considered by the minority to be an insult, otherwise we would need bathrooms in a million shapes and colors.
.. And by the way, as a short male i personally feel slighted by the height depicted , comparison wise, on these signs. As if i were not a true man for not being as tall as the women depicted.. where is my "short guys piss here" sign !?

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I didn't exactly like the borderline-socially-justicey-bs (you know, making a deal out of nothing not the kind that actually gets things done) feeling I had while reading the article but nevertheless it was a good one and gave me something to think about. Thanks for sharing!