No, that's not me robbing a bank. But give it to someone with some computer skills and some free time, and I bet you could make it pretty convincing.
One consequence of the latest technology is that nearly every event of significance is photographed. At the very least, there will be dozens of people standing around with cell-phone cameras. And all photographs and official documents can be disseminated over the Internet, instantly.
Yet the current technology also makes it easy for a skilled technician to fake just about anything. This is creating an extreme and unfortunate brand of skepticism as an inevitable consequence. The news that three senators may have been fooled by a fake photo of the deceased Osama bin Laden is an important data point here. So are the doubts expressed in some quarters about Obama's birth certificate.
I do not believe there is any chance on earth that Osama is alive, if for no other reason than that the Obama administration has too much to lose. Obama's presidency would be brought down overnight if Osama were to show up in a new video, reading the day's New York Times out loud. (The only possible sinister motive behind withholding a death photograph is that it could reveal further problems with the ever-shifting story of his killing -- for example, if it revealed a point-blank shooting).
Administration officials have pointed out -- correctly -- that even photographic evidence of Osama's death will be doubted by the true skeptics. After all, we have already seen doubts in some quarters about the provenance of Obama's long-form birth certificate, based on frivolous arguments that reveal ignorance of the technology with which it was put out.
Unfortunately, thanks to modern technology, no one believes their own eyes anymore, especially if they don't want to believe. To some degree, it is understandable, even when it leads to grave errors and bogus conspiracy theories.