Since you'd like to get reliable results from all over the world, there's hardly any single suitable timing for such a poll. The only hope is for it to stay visible for close to 24 hours.
OT, but frankly such attitude is recurring and I can't imagine how it is compatible with HN "ethos".
If you're at work, be effective there or change the work. What's to be so proud in slacking during work hours? Would you want such people working in your startup?
Mercenary (sneaky): "They're getting the exact amount of work from me that they manage to extract."
Mercenary (quid pro quo): "They're getting what they're paying for. If they want increased work ethic, they have to increase their pay ethic."
Mercenary (clever): "I will go above and beyond the call of duty in ways that get noticed by my boss."
Work ethic (intrinsic/weberian): "Work in the sweat of thine brow from dusk till dawn. I sleep well at night knowing I always do my utmost for my company."
Work ethic (LessWrong.com / game-theory): "It's utility-maximizing in the long-run to pre-commit to being the kind of person who has good work-ethic, even if there is no utility to be gained in a specific concrete situation."
Work ethic (soldier): "I'm a professional, I get the job done."
Hostile: "Fuck 'em!"
Snake: "Fuck 'em! But pretend to like 'em so I get a raise."
Survivalist: "Anxiety. Depression. Gastric upset. Make it through another day. They took my red stapler."
Ruthless prioritizer: "It's really too bad that I'm slacking off at work. But time/energy is scarce and my own projects have to take precedence, sorry."
Conscientious objector: "I'm not going to work hard for my company, 'cause they're at best neutral and at worst actively harming humanity."
No one can work 100% all day every day. You get 4-5 hours of good, solid productivity before you burn out. Take a break every now and then, you'll live longer.
Your comment keeps getting up/down-voted like crazy, which seems to indicate that there is a strong and opinionated divide on the topic of proper work ethic.
It would be a lot more interesting if people actually stated their arguments, though.
HN isn't that bad because you can read articles on how to improve your coding skills, learn about libraries that can help you be more productive by not reinventing the wheel, and so on. As long as it doesn't get in the way of work that has to be done, there's much worse ways of slacking off.
Most are not in startups I guess. For me it is the duty of your boss/company to give you enough interesting work that you don't even think about checking HN.