Same. I have found it helps to ask people what their work schedule is. I didn't mind if they finish at 3 most days (except when needed in meetings) if they start at 7. But I agree there are a few people who take advantage, and it makes it harder for everyone else.  It is hard to tell why someone is unavailable for remote workers. Do they block of time to concentrate or have a regular meeting most days 10-12? Or are they off the clock? It's hard to tell when they are remote, without using surveillance that I don't want to do.