I have some new and reevaluated thoughts on this!
When I first saw/reposted this, I thought "Ha ha, yeah, age segregation is ridiculous and this humorously points out just how ridiculous it is!"
But I was thinking about it again in light of some thoughtful posts about how the argument "This queerphobic law, if taken literally, would be ridiculous and impossible!" isn't actually a very helpful argument, because queerphobic laws aren't going to be enforced equally, and pointing out "Ha ha, banning pronouns would mean you can't say 'you' or 'I'!" or "Ha ha, banning mentions of sexual orientation would mean you can't say 'Mr. and Mrs. Jones'!" doesn't actually address the harm of the intent and effect and enforcement of these laws.
Of course they'd be ridiculous if applied equally, but they're not going to be, and that's the point.
(I do still think there's some value in pointing that out, in making visible the default, in pointing out that "gender" and "sexual orientation" includes straight people too, but I can see how it's not always helpful when talking about queerphobic laws specifically.)
And more recently, I've gotten into more discussions with people about exactly how and why age segregation and "Adults shouldn't socialize or be friends with kids" is harmful.
The "Adults shouldn't talk to kids" ideology always has an unstated, taken-for-granted exception for parents. That's so taken-for-granted that when a space actually does have a "no adults" policy that actually includes parents, parents lose their entire minds.
The Venn diagram of parents who flip out because a strange adult said "Excuse me" to their kid and parents who are mortally offended that they can't waltz into their kid's classroom to meddle anytime they wish (oblivious to the fact that they are a Strange Adult to every other kid) is a circle.
There's also always an unstated, taken-for-granted exception for people acting in loco parentis (teachers, babysitters, coaches, etc) or "in a professional capacity."
I've argued with people on the "Adults shouldn't be friends with kids" side who argued that, of course kids need adult role models, and possibly influences other than their parents, but they should be "professionals acting in a professional capacity."
No one who says things like "Adults shouldn't interact with minors" actually means that literally.
What they mean is "Adults shouldn't interact with minors except from a position of explicit authority over them. Adults shouldn't interact with minors on equal social footing, as friends, as acquaintances, as fellow citizens."
The root of this ideology is "Adults with power over children are safe and non-abusive, but regular adults out in the world with no specific power over children are dangerous."
Which is exactly backwards.
And, it's pedo panic, it's always pedo panic -- that's how people justify it, that any adult in proximity to a child must be trying to abuse them -- but it's more than that.
It's based on fundamentally harmful ideas about child development and social relationships.
What it's actually about is the idea that it's somehow inherently emotionally harmful, developmentally inappropriate, or traumatic for children to see adults as whole people.
The 19th century conservative authoritarian idea "Children shouldn't see adults as flawed individuals because that would undermine their respect for adult authority" has been horseshoed into the pseudo-progressive "Children shouldn't see adults as flawed individuals because it threatens their sense of safety."
The necessary developmental stage of children realizing that adults -- by implication, including their own parents -- are just regular people has been reconceptualized as a form of child endangerment.
This is such a harmful worldview. Kids need to interact with adults who aren't bossing them around or taking care of them. Kids need to see that adults are real people with their own interests, problems, quirks, and lives. Because, much as the powers that be are invested in denying and thwarting this reality, kids are future adults, and it does them no good to see their future selves as a weird alien species.