That would be true in other places I've been in the past (especially in the Valley), but whenever someone on my team is responsive outside work hours and has be

That would be true in other places I've been in the past (especially in the Valley), but whenever someone on my team is responsive outside work hours and has been working more or less as expected during office hours, I tell them to take the afternoon off or come in late. If it's a recurring thing due to a major deadline that's behind schedule, then they get extra vacation days.