It was no problem on most European and Asian airlines, I spent quite a few hours in cockpits of several carriers, including LH on short and longhaul services, friends and collegues of mine reporting the same (Best carriers in my experience: BA in general, LH, if you don't mind to pester the crews a little bit, they rarely said no, Thai, very friendly and cooperative, they consider your interest as a compliment). I did make pics (but never posted any), no problem as well. Since sept. 11th, well, you can just about forget it, at least in Europe, don't know about Asia, but I guess not that different. Just give it some time, people tend to forget!
I know it's only VfB but I like it!