+1
Oh, well looks like Mark beat me to the punch a bit. Anyway, 9/11 never really had a big impact on me, heck, when i was told i didn't even know what the Twin Towers or World Trade Center was. Obviously the images of the crash were pretty shocking and that was all i really took away from the event, seeing people jumping off was obviously upsetting. However United 93 completely internalised the reality of the last flight and made a truly moving film. Not for commerce but as a memorial of the tragedy and heroic nature of those poor souls lost. And the whole way Greengrass follows it is remarkably objective but brutally real so by the end as the inevitable occurs, it was totally devastating as a viewer. As for watching it, it got good word of mouth while it was at the cinema and i eventually got it cheap on DVD. And i'm not at all ashamed to have spent money on it as otherwise i'd never have appreciate or realised the brevity the event as much.
On an aside, have you thought about the profits plenty of other films have made from World Wars and such? Out of interest, does your reasoning extend to that or does their more fictional nature avoid the problem?