... and, to get back to flight-related stuff, today's flight BAW6B, arrival LHR 13:35 on Friday 31st, is currently over open ocean, South of Greenland.
I shall keep an eye out for it as it comes in.
And to get right back to the OP, are such flights hoaxes? We have the data from FR24. The fact that I can see the planes coming in to LHR from my window, and that I can identify both the airline and the plane type (but not the flight number) suggest that the data is authentic. Further evidence could be obtained from the departure and arrival boards online.
Then there is the secondary question of whether we can infer flight
distance from flight
time, which requires assumptions about how fast planes fly.
We would then have to look for evidence including wind speed. See e.g. the wiki
https://wiki.tfes.org/Issues_in_Flight_Analysis.
One experiment would be to find flights on the same route but travelling in opposite directions. If high wind speeds were causing discrepancies, then the effect should be equal and opposite.
Perhaps the subject for another thread.