The way you describe the harm it causes to the employees sounds, to me, like a managerial problem. My company has several of those "works late, comes in late"

The way you describe the harm it causes to the employees sounds, to me, like a managerial problem. My company has several of those "works late, comes in late" employees, and none of them are seen as lazy. We have managers that recognize and re-enforce to the other teams the work that we do and the people we unblock and the wins that we're able to make. I just completed one of my own reviews where I was lauded loudly as a person that unblocks other people - while my own official tasks are relatively light because my primary task has become unblocking others - and a coworker was recently promoted due to her weird, off-hour work. Why? Management understood our strengths and re-enforces them, protects us from nay-sayers and rejoices openly about the work that we do. That way, we can keep working in the areas we're good at, in the way we're good at it, and we're given the recognition for our work through our managers. With a good manager, you shouldn't have to be constantly trumpeting your own skill, they should be revealing it for you. Managers, and I'm sure many of you are here on Hacker News, this is one of your many, many jobs.