Oh, well, since you weren't there, and neither was I, then it CAN't be ruled out that it was faked.
Applying this logic means that ANY knowledge we ever gain by means other than pure observation cannot be trusted because we weren't there.
Moon Landings- can't be proven, neither of us were there.
Existence of indonesia-can't be proven, neither of us are there right now.
Nazi Germany was led by Hitler- can't be proven, neither of us were there.
William Shakespeare wrote "Hamlet"- can't be proven, neither of us were there.
New York still exists- can't be proven, neither of us are there. (assumption)
Obama is president of the US- can't be proven, neither of us are there.
To claim that something is fallible because neither of us were/are there is preposterous and counter-progress, as it means that anything we learn must be immediately disregarded as fallible.
So, on this line of logic, we must doubt everything except what we can reason ourselves.
So let us undertake a hypothetical line of logic.
Let us assume the Earth is flat.
most of the 7 billion inhabitants of the planet are mistaken, and have been kept in the dark about this by a conspiracy of some description.
So this conspiracy is very well-executed, as it encompasses 99% of the Earth's population.
How much would this conspiracy cost?
"Space Weightlessness": Average cost of hyper-realistic CGI in movies: $45 000/min
Hours worth of ISS footage are beamed down daily, very rough estimated cost: $4,000,000/day=1,460,000,000/year.
Not to mention that animation takes an average of 6 hours to create per minute of footage, but we'll ignore that.
To sum up all of the necessary costs would be futile, but my question is simple: what is the point?
How much profit can be made from convincing the people of Earth that the land is round, when it's really flat?