Because 8 - 4 is somehow less hours at work than 10 - 6?
I'm back working in an office that allegedly operates flexitime, I prefer to come in early and leave early. As a regular 4 leaver I always check and always stay if others want to go early - this means I stay till 5 on a Friday most weeks. But the 10 - 6ers are bitching as they obviously put it more hours than me every day! Of course they swan in every day at 10 (core hours we need to cover begin at 9) but never check that someone will be in to cover. So I'm frequently the only person covering that hour. But no I am being a very unreasonable slacker as they're in the office till 6 most nights.
So AIBU?