How is it not reasonable? Commenting here is clearly a total waste of life compared to curing cancer, one of the most noblest pursuits, and we've taken it upon ourselves to judge how other people spend
their time. And of course once we've decided that I am the arbiter of what other people get to spend their time on, and I've decided
that curing cancer is the most important thing to be working on, anyone not working on that gets sent right to waste of time jail.
Watching TV and playing sports or having a drink with friends, all banned under this regime because that's all unnecessary. I might also be possible that everyone's concept of what's valuable and productive is entirely subjective. Demonstrating that PDFs have JavaScript interpreters these days and are not a static content rendering system, and are not to be trusted, in a way that goes viral for maximum exposure, in the off chance someone learns something about how insecure they are, and they avoid getting hacked seems quite valuable to me, given how much money gets lost to hackers.
No one spends all their time only doing productive things, and some choose to spend it making things that other people find neat enough to share, like this PDF. Other people choose to spend their time commenting here. What else do you do for fun (when you're not off curing cancer)? Why is that any more worthy?
Why does it bother you how others spend their free time?