Well done DFC!
You've got some great ones here.
How many "Lybian, Iraqi, Iranian, Outer Mongolian " planes are in the UK?
Your money laundering argument is even better. I am sure a foreign reg plane would be suitable for importing a certain type of porno material, too. But, anyway, one would deal with ML in the same way as everybody else in the relevant business has to: ask for a couple of utility bills etc
The rest of it is plain daft.