Are "you" a test pilot for Boeing like "Tex"? I sure am not. Really, why would anyone roll an airliner? It's like taking a bus a few laps around a race track. Why would anyone? It's just stupid and you'll probably break something expensive on the bus/airliner.
I think there is a little bit of a semantic miscommunication here. I meant if you had all the skills and opportunity that tex had, and you believed that the maneuver was completely safe why wouldn't you? The reason for doing it is pretty simple: a once in a life time opportunity to have some fun. I think taking a bus around a race track might qualify as well.
http://www.youtube.com/watch?v=Fh7fQz4xzW4 Seems to me that a lot of what you might call fun you also might call stupid, eg: wasting time and money on a video game pretending to fly ww2 aircraft when there are so many more productive and important things to do with our short little lives. If you told me that tex was rolling at a low alt over downtown seattle, well of course that would be different, I get the impression, (which might be completely erroneous,) that the flight was over water and that the test engineer ,(guy who snapped picture,) was game, so worst case is a hole in the ocean and a couple dead people that got a little carried away.
How do you feel about those bat suit guys? I'd love to do that but I never will cause the risk is to high. I don't however think that they are stupid or wonder why they do it, if anything I'm jealous. Jealous of their youth, their sense of invulnerability, and their enthusiasm.