Don't you think if people came to the site at certain hours and there was a page saying "get back to work, we'll reopen in 1 hour and 14 minutes" it might interrupt their procrastination in a useful way, and make them think, "Ok, I'll work for a couple hours, then read the news?"

I find when I've been procrastinating and there's some kind of reward coming in an hour or two (e.g. dinner) that often makes me buckle down and start working.