is hoon an insult? probably not, because if it is, soma would have used it against us.

It's used more in the following context. Instead of saying - 'Can I have a ride in your car', you'd say 'Giz a hoon in your car'

now you're just screwing with us.

....or am I?

In my book, hoon is a verb. But people in Aus do use the word to describe someone that's driving dangerously. For those, I prefer to call them fuckwits.