Very good points raised in this blog post. I think that working out of hours is almost inevitable when you are really excited with something you’re working on. However creating a culture around that is unhealthy. In this article, I particularly like the point about not broadcasting it when you do so.
One of the causes [of working outside of office hours], as corny as it sounds, is people taking an interest and enjoyment in their field of work. It’s certainly true of myself and I daresay true of some others. I find it particularly hard to switch off and put down an interesting problem that I’ve been working on during the day. (…)
One simple solution is to just reduce the amount you broadcast while outside of office hours. By all means work, if you so wish, but don’t do anything that generates noise and makes other people aware of it.