Uh, if the expectation when one arrives ~1hr late is that they will also stay ~1hr late, what is there to abuse?
Yeah, unfortunately my company has "core hours" that start @9am so I am expected to be around starting @9am.
Do you think those people abusing it are getting less work done than they otherwise would?
How? What's the possible "abuse" of working at different hours?
How does this work, in your mind? Every stupid, indefensible policy I've ever heard of has been justified with this lame excuse. If somebody "abuses" something, take disciplinary action, how is that so damn hard?