I think it would be pretty impossible to keep a conspiracy going for shits and giggles. Someone down the line would get bored or not really understand the joke and let wind of it out. And as far as Tom saying it's for money, there would be someone who would think it's not honest and blow the whistle on a scam like that.
Right, you've stated your belief that it would be impossible and your reasons for that belief but you still haven't demonstrated that it actually is impossible. There would be a chance of whistleblowers with any motivation and while I whole heartedly agree that the chance of whistleblowers if the motivation was "for shits and giggles" would be virtually 1 can you actually demonstrate that it would be 1? Even after this you would still need to demonstrate that the chance of a whistleblower successfuly getting the word out and being lisitened to (and not just by the other people in the nut house) would also be 1.
I didn't say totally impossible, just nigh impossible. Nothing is truly impossible, just the odds of it happening are astronomical. Hell, even the odds of Tom actually having emotions one day can't be ruled out 
But with this train of logic you can disprove anything, so it's not impossible for the earth to be round then either, or anything else you want to spout off.
I think plenty of things are impossible but groups of people deceiving people for shits and giggles is not one of them. Absurd yes, impossible no. People can be motivated by a warped sense of humour and can try and pull the wool over other people's eyes and groups of people can do the same. This is what makes it a possibility as a motivation for the conspiracy, not some philosophical mumbo jumbo that "anything is possible".
Did you disagree with my analyses of where the value of this conversation lies?
Ok, let me state again that I don't think it's an impossibility for this to happen (conspiracy for S&G's), but that it is highly improbable and should be discounted. Now before you say, "AHA! I have you now!" let me also state that the increase of improbability should be a factor in ruling out something for a possibility. If we don't draw the line somewhere with the absurd/improbable we will forever be going in circles.
Now, let's see if we can use this line of reasoning and come up with some better, more likely reasons for a conspiracy.