Your score doesn't determine if you're a Hack or not, it comes down to how you conduct yourself when you're on the course.
a Hack is someone that doesn't wear the proper attire to the golf course
Shows up late for a tee time
Whispers while you're putting
Talks on his cell phone constantly
Looks for a lost ball waaayyy to long
Throws clubs
Cheats
Isn't ready to hit when it's his turn
Starts his cart in the middle of your swing
Has to finish the story before he hits
wants to know what club you hit
walks in your putting line
leaves his cart or bag in all the wrong places
tells you what he did wrong after a bad shot
wants you to play bad
complains about the course
doesn't say nice shot