The 3, 4 or 5 option is fine.....3 is good if your doing some quick 'n simple thing....4 if it really needs that 'extra shot'.....5 if you've taken enough different pictures to tell a cohesive story within that cap.
The 24 hr thing is more of the bitch IMO......I'm not advocating 3 every hour on the hour, but sometimes you snap something the night before, post it up in the morning and then go snap some more during the day but can't post them up again for another 16+ hours.......that gets to be a cramp.
The thing is, post with common sense........and honestly, I don't see any problem with *gently* informing the 'n00b's about picture etiquette.......hey, everybody's got to be able to take some constructive critiquing-otherwise, why in the hell would you pose and post pictures of little plastic army men (and women)?!?!
