Yes, when Valerie takes the aliens to the salon they start spitting on some of her things and she comments on it. Not very graphic though, you just see it in the background
Sort of, the doctor is made to feel crazy when he discovers the two heart beats in the aliens, and is tricked into thinking he is hearing things, which causes him to have a breakdown
A character wakes in an unfamiliar place, believes she has been kidnapped, and is very afraid for several minutes. The intent in that scene was not kidnapping, but it effectively was.
Aliens are repeatedly seen on screen eating pet tropical fish: putting them in their mouths, and removing the bones from their mouths. The character who the fish belongs to is seen being very upset about this.
No one is assaulted however a woman is cornered with a fake gun (which she thinks is real) and forced to remove her uniform so that the main characters can use it to sneak into an operating room. This happens in front of a patient who seems excited by it (refuses to call for help for her) and the woman tells the main characters that they will get in trouble for assaulting her if they do - scene goes from when Valerie says she has a crazy idea in the hospital elevator to 01:27:05