The idea of the fuel stop in Bogata is curious. If the distance is 116nm as someone posted, that gives about 15 minutes less time. Bogata might have been possible to make, but certainly not legal -- no alternate/reserve fuel.
About ATC acceptance: ATC has no ability to confirm the actual legality of fuel for each flight. They'd need the fuel performance tables for the type, actual fuel and weight, plans for alternates, contingencies, etc. They don't have the knowledge to do that, not being flight dispatchers or ATPL, so can't reject flight plans for illegal reserves. Give them a flight plan legal and one just short, they wouldn't know.
The only reason "Celia" spotted it here was that it was egregiously obvious: only enough to make it with dry tanks.
It is not a matter of what is not known, but a matter of that which is known. Namely endurance and time en route. More to the point the obvious, which leaves only the incredulous. Hence the remarks by Livesinafield, "..... I think it stinks of a hoax ".