We tried to take a picture of the Aer Lingus we had just left when we got to Dublin and the reaction we got you'd think we tried to fire a rocket at it or something.
Mind you I did check the website some time after and it said anyone intending to photograph aircraft had to notify them and pay 200 euro for the privilege!
But I havent seen that on the site since the airport was expanded and a Viewing Platform included in the expansion so I dont know if that is still the case.