Gross:
Unflushed toilets or worse yet are the stalls you walk into and it looks like someone literally exploded in there...all sorts of colors and liquids all over the seat and floor surrounding the toilet. Or the used feminine products that were not wrapped up and thrown into the little trash can....EWWW!!!
Stinky people...Now I know that some people may have used deodorant in the morning and may not be able to control their body's immunity to deodorant...BUT when you get into the boat for It's a small world and sit in the row behind someone who STINKS SO BAD it makes you nauseous, you start to wish some people would go back to the hotel and shower in the middle of the day... that is a long ride to have to endure those kinds of fumes!
We once saw a little girl pick up a salt shaker and lick the top of it (where the salt comes out of) at a restaurant.
Really full diapers or poopy diapers with the kid just sitting in it. Poor kid...
As far as breastfeeding... I have no problem with it, I would prefer that the majority of the breast be covered just so I don't have to explain it to my 3 year old (he would not be satisfied with the "she's feeding the baby" answer...he would be like how? where's the bottle? What is that? (he doesn't know what b**bs are yet...lol...as far as I know).
My husband however...(poor guy) say's he doesn't have any problem with it, but he says he doesn't know where to look, it's one of those things that you don't want to look, but you glance anyways..
As far as smoking...I am a huge anti smoking person, I think it's just because growing up all the commercials started coming out about the dangers of smoking and my dad has always smoked, so it's a constant "Daddy, please stop smoking" battle for me...I hate the smell and don't want it anywhere near my kids, the smell lingers on your clothes, hair and hands, it's gross to me! However, I do understand that Disney would loose some money by banning smoking, I just wish that people would stay in the designated smoking areas and that the areas were better placed. There was one outside of our room at Port Orleans (FQ) and it was in this flowery garden that the kids wanted to see, but couldn't because of the smoke, but didn't understand why they couldn't...
As far as the nose picking...that's my boys...SORRY!!! I can't get them to stop! My oldest learned it from a neighbor and the youngest got it from the oldest. The oldest is also Autistic, so it's very hard to teach him the germ concept...AHHH...They also eat the boogers which makes me sick to my stomach and I really am at a loss for how to stop it...

Another gross thing...My 3 year old sucks his thumb!!! You have no idea how much hand sanitizer we go through, and he hates hand sanitizer because it makes his thumb taste bad, so I have to fight him to get it all over his hands, but then he screams because his thumb tastes nasty...I keep telling him to stop!!
The absolute worse thing to me though is a woman breast feeding her baby WHILE smoking a cigarette. Seriously???