Wow, he messed up the title of the thread. Everyone talks about common-sense here, yet don't use it with something as simple as interpreting what he actually meant in his original post... hope it didnt ruin anyones day.
I agree with Lambourne (except that unfortunently its not only at the regional level). Some of you act like it would be some sort of criminal act on the same level with murder

if he introduced himself to the crew and head F/A, and asked them if there is a possibility of an upgrade if theres extra room. I see absolutly nothing wrong with that, and I would try it.. just board towards the end. It is a special occasion that you will not be able to repeat (at least with the same person) so why not, if they say no, the o well, at least you tried.
There is absolutly no solidarity between pilots, at least that is how it seems on this board. Everyone constantly complains about reduced terms and conditions, but acts like it is some sort of travesty to expect anything more then the normal PAX does.