I like to yell racial slurs at people from my car
What gives you the right to yell at others from your car?
I consider it freedom of speech, I enjoy seeing how their faces react once they realize who's doing it.
Racial slurs are a weapon to some. You should not yell such things  at people it is very insensitive.
Fuck that. I do it for fun.
You need to find better things to do for fun. Harming others indiscriminately is wrong, and people are going to assume you are racist if you shout slurs at people.