Annoying as passengers can be, I do think that for the most part you need to just answer the dumb questions. There are people who may be hard of hearing, visually impaired, mentally disabled in some way and so on.
It might seem funny, but winding up members of the public probably isn't a good idea. Now, having a friendly joke is another matter. No harm in a little humour, but not deliberately trying to mislead or confuse people.
I don't think I need to give examples as I think it's pretty much common sense.
Even someone asking if train X stops at Y, despite it being shown all over the place, is a fair question for someone who might be nervous or panicking over something. Perhaps their mind is elsewhere because of circumstances we don't know about - and they can't afford to make a mistake and end up on the wrong train. On some services, getting the wrong train could be disastrous!
Your right they may well be.. Have we to lose our sense of humour when dealing with the public nowadays?
everyone i have said something joking to they have laughed along when I have let them know i was joking and ive never had a complaint in over 10 years.
I guess if your a dour old ****er then maybe you should try smiling when joking with passengers.