\int_0^1 \frac{x^4(1-x)^4}{1+x^2} \, dx = \frac{22}{7} – \pi

looks to be correct code, stolen from https://en.wikipedia.org/wiki/Proof_that_22/7_exceeds_π. I hope wordpress does not mangle the TeX I posted.

]]>As for why that doesn’t seem to have happened, back when I was a little kid, kids went trick-or-treating alone, or in kid-only groups (cf the Charlie Brown special). From what I’d see at my parents’ house more recently, elementary-school-age kids are now always accompanied by parents hovering in the background, so the safety argument goes out the window.

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