The thing about working in the ER is you will deal with all kinds of people. Some you won't want to deal with.
Like gangbangers, criminals, sex offenders, mean drunks, people who choose not to take baths or use deodorant. Whether you like it or not, all these people get sick and injured too.
I have taken care of people who, frankly, scared me. Sometimes you just get this sense that people are dangerous. That's when you do whats necessary and don't spend a lot of time in the room. You keep the curtain open and security nearby.
This is the part where you wonder why people who work in ERs don't get more money. Where else do you deal with not only "regular" patients, but all the people the rest of society avoids, moves away from, etc. This is where the danger comes in. Where there is danger, there should be more pay. Kind of like the military, when you are in a war of conflict area, you get hazardous duty pay. Thats what we should get in ER.