Thanks for the replies.
I know that song about the wolf, we use to play it as kids all the time "Whats the Time Mr Wolf?" that's actually a good suggestion because it goes with the idea of "what's the Time" so it would appear that it just popped in my head from hearing the beer chant.

As for smokers, well sorry but that is something that effects more then just the person doing it. If we are within the person earshot to hear mine or my sons comments then we are also within breathing space of the toxic smoke being puffed into the air my child & I have to breath.
But as I said I do agree that adults may find it rude for a 5 yr old to say something about it. But I am also not about to turn around & tell him, No no its ok that they are smoking. Because I believe its not. Its a disgusting habit that does effect more then just the person doing it.

Talking about the after effects of drinking is a good suggestion, I will do that.

Also, the parent in question isn't sitting around getting drunk, it was just a beer while he was out the back doing some gardening. It was more the chanting of the song that bothered me. I don't agree with alcohol being something that is consumed as a normal drink at home either. BUT that is because I never grew up with any in the house so to me that's just strange. Alcohol is something you go out to drink or have for a special occasion. Not that I drink it then either.

But thank you have all given me something to think about.