From our Fantasy cruise last month, I would have to say the elevator invaders were the only ones that I thought were rude. Several times we would be on a quite crowded elevator only to have someone(s) crowd in. Had it happen once that the elevator was like a can of sardines, so much so, that the door couldn't close because the "invaders" were blocking the safety light sensors that keep the doors from closing.
And I don't mean this to be at all tacky, I promise, but one thing I have noticed the last few years at WDW is that with certain cultures, there IS no sense of "personal space", and it is apparently fine to cut into lines, etc. I suppose where they are from that might be hunky dory.

It certainly makes me do a little more homework before I travel outside the country to see what the social mores are in my destination country. I don't want to be "THAT" tourist, ya know?
On this topic, we had a very funny thing happen on the 2015 Hawaii
DCL sailing (well, let me get this straight....
I thought it was funny! DD did NOT.

). DD#2 ( a very well mannered, grown young adult) & I did a tour that included a visit to Big Island Candies (mmmmm). It wasn't that busy when we first got there but a busload of Japanese tourists pulled up. I thought nothing of it as I browsed and watched the candy making. The more the merrier, right? And I have always found the Japanese to be oh-so-polite. DD was looking around separate from me. Several minutes passed before I saw her and the look on her face was

. When asked what was wrong, she told me that she had been shoved HARD, not once but TWICE from the same cute little old lady! DD said the lady wanted to be where she was, so the cute little old lady (she pointed her out to me, and I'm telling you, she looked like a semi-frail cute little elderly woman) I started laughing as it was so unbelievable. DD said she was dead serious. Now you need to know that I raised her to respect others, and especially those older. And I taught my kids to be respectful of cultural differences. And they do. What I found out much later from a dear friend that is fluent in Japanese, and lived in Japan for year, is that apparently it is well accepted for the elderly to be very pushy physically to get to where they want to go. Who knew?

Again, makes me more aware of trying to learn about other cultures, especially when visiting foreign countries.