APPARENTLY, THE FOLLOWING SCENE is a demonstration of the daily racism dealt with by Hawaiians whenever tourists populate the area. They're often ignorant, and speak without thinking. So what does our protagonist, Lilo, decide to do? Make them look like asses via exploiting their general ignorance of the area and never revealing the routine nature of the Tsunami siren check. Good times.
According to someone on tumblr:
It was clearly something the crew was very reluctant to get rid of if it made it all the way to rough-clean (and in a few scenes clean!), fully inbetweened animation. That is like, thousands and thousands of dollars and weeks (months?!) of labour. Maybe a reluctant producer decided they would alienate their white middle-class American audiences by making them feel “too guilty” and pressed them to drop it? It’s unfortunate, it’s one of the most honest accounts of racism in a Disney movie (which is why it’s believable that someone got uncomfortable and made a case to get it chopped). Designing entertainment by committee for maximum marketability is probably the most heartbreaking process in Hollywood. [X]