Our campaign is generally darker in tone -- there's a lot of espionage, politicking, and dirty tricks...why? 'cause I don't buy into the Roddenberry 'rose-colored-glasses' future.
In general, the UFP does some crappy things but most people don't know it. The characters in the series are usually very model Starfleet officers: hopeful, idealistic, and copletely naiive. They inevitably have to adapt to the realities of the universe around them, or become very entrenched in the dogma of the UFP.
There's still the clean, brightly-lit corridors, the replicators, etc... but I just don't see Man losing his baser natures.
"War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."
John Stuart Mill