As someone who has taken the kids out and about during the day, I have to say that it's awkward. You end up being the only man in a group of dozens of women with their kids, or you are the guy at the playground sitting by himself while his kids play on it (which looks a ton like you don't have any kids to an outsider). Society, at least in most of the U.S. is frankly a bit hostile to males as the caregivers. I can't imagine what single dads have to go through.
And now you know how it feels to be the only woman engineer on a team of 20 engineers. It's awkward and sometimes hard for women engineers like me to focus on our jobs because of the awkwardness contributing to hostile work environments. And this is why it's awesome that YC is supporting Women Who Code.
Sure. Just so we are clear though, there is a huge difference between being regarded and treated as a potential pedophile/kidnapper (father at a playground) vs. simply an outsider.
I don't think "simply an outsider" covers many of the experiences described by some women in tech: Groping, sexual harassment, assumptions on getting the job on looks, over-scrutiny of their work, etc ...
This is not every woman's experience, but neither is the pedophile one. I have worked at an all girls school and everyone - parents, students, children was fine with it.
Here in Sweden I'd say it's always basically 50/50 when I take my kid to the playground, no matter what time of day. Make it easier for dads to take paternity leave and more will do it and it will become more common and stop being awkward.