yes it is, but it's one of those unwritten rules where the police turn a blind eye unless you are deemed suspicious.
I'm living in Turkey and got busted last weekend for doing it actually. I was near the fence waiting for my friends plane to take off. Security guard moved me on so I went across the road into a car park and watched from there. The b*stard still sent two police vans after me when I walked past him 10 mins later on the way home. Luckily the cops were ok with me when I explained I'd only taken 2 pictures and it didn't include any of the airport - just the plane and that it was my friend on it. I won't be going back there again in a hurry. I'd rather planespot from my balcony
