Actual spit censored, because that is what decent humans actually do.
Spitting is forcing people to see what's in your mouth.
If someone wanted to ever see the contents of your mouth, they would kiss you.
Via giphy.com
People who spit off of balconies are no better than birds who poop all over cars.
Just because you are spitting into water doesn't mean people don't still have to see it. The scene where Jack teaches Rose how to spit in Titanic is one of the most unwatchable parts, and Titanic is a movie where people drown and freeze and die.
20th Century Fox
The sound of people trying to hock a loogie is the closest sound to nails on a chalkboard that a human being can make.
Even the words "hock a loogie" are horrible.
Via giphy.com
People who spit in trashcans are people who don't care that other people have to touch and put things in that trashcan.
Not to mention smell it. Spit is not odorless.