Killer ... Sorta, my mindset is: everyone online is a douche. Even if you just pass by I'll open fire shouldn't have used the same road as me. Depending on my mood I may also go and kill randoms and Bounties get hunted down. I don't fire at friends or crew members, and if I accidently kill one I send an apology text.
You're not just a killer you're also an asshole for just shooting them just cause you assume their douchebags, i sometimes FEEL like i need to kill people and other times i just go about my business unless someone else shoots me for no reason like you for example or any other player then i will chase you all over the map.