to be more on topic: mosquito bites on planes yes, on numerous occasions - Air India spraying the cabin with insecticide before take-off seems to be based on sound experience.
I have never heard of bed bugs but I guess, considering the fact that the blankets aren't cleaned every time, bugs could survive between one pax to the other one.

OTOH it could just be similar to the fact that I am getting itchy whilst writing this (you rading about the bugs on the plane...)

rajah