Have you ever been to the ocean? Good, then you know the Flat Earth Theory is wrong. Ships masts appear first on the horizon.
The theory states that the earth is not actually a sphere, but rather disc-shaped with a domed ceiling.
On the website for the Flat Earth Society the first two questions in their FAQ are: "Are you serious?" and "Are you controlled opposition?" The answers are Yes, they are serious, and No, they are not controlled opposition.
Controlled opposition refers to a group posing as legitimate and spontaneous, but actually created by the government for some purpose, which we will get to later on.
I'm not convinced this is a government operation, but rather some first class dedicated trolls.
And yet, there are all these straight-faced flat-earthers out there who swear that what they say is the truth.
I'm sure at this point they have convinced some people that their theory is true. And I'm sure this only emboldens the original trolls.
But they still prove an important point. Absolutely anything can be made into a conspiracy theory and presented in a way to make you wonder. The fact is we don't really know anything for sure (is this all a simulation?) and this means it is impossible to disprove most theories if you get "meta" enough.
But take a moment to appreciate the dedication it takes to put out a lie like the flat earth and stick to it without bursting out in laughter every time you present the information: