Please... - you shouldn't worry about being '
That Passenger' - ever! You've paid and that gives you the right to be there and to ask for reasonable stuff in a reasonable manner. The people who
are '
That Passenger' are those who ask with attitude and they are (mercifully) few and far between. The relationship we aim for should be one of a guest visiting somebody else's house - a guest. If you get attitude back from somebody when you have politely made a reasonable request, then the issue is with that crew member and needs to be addressed.
The call button is there to be used, but as in all things, with a degree of sensible moderation: I would personally roast any crew member that I was made aware of who gave a premium class customer a hard time over using it for a drink!
