Indeed.This is why the poll is pointless, the average person doesn't understand that enforcing a no-fly zone IS military intervention and WILL involve firing on enemies to enforce it. And in any case it doesn't really matter, wars may not be conducted in a cultural vacuum but what Joe on the street thinks will be of almost no consequence whatsoever whether NATO decide to declare a no fly zone (read: shoot down Russian aircraft and effectively join the war).
It is why a poll on the restoration of capital punishment is not a good idea.
And indeed a poll on Brexit is not a good idea.
Oh, wait.....