At least New Scientist printed my letter, in which I pointed out that their logic went:
An airliner hitting a nuclear plant could do lots of damage.
Some light aircraft/ballons and the odd fast jet sometimes bust the RA's around nuclear plant.
So there is a significant risk of lots of damage...
A microlight would hardly leave a scratch on a nuclear reactor shell, and even a Tornado wouldn't make much of a dent.
Tim