(cops were at EVERY single meetpoint

All it takes is one idiot to do a burnout and attract police for them to mess it up for everyone, but anyway that's not the story.
It was 2:30am and I was heading home and I saw a police car hiding up ahead in the distance behind bushes and my radar detector went off alerting me I had been hit by a laser, so I took the next turn but then stupidly drove into a cul-de-sac, now the police weren't too happy about that and he was a bit unhappy about it and started threatening me with bogus fines.
"You're lucky I don't fine you for that radar detector right now!!"
"You're in trouble now mate, you're dealing with a traffic cop!"
"I'm GOING to find stuff wrong with your car and I'm going to yellow sticker you"
After about 5 minutes all he finds is one bald tyre but instead of yellow stickering me I get slapped with a $100 fine..
after he found that he said in the stupidest tone "I told you I'd find something wrong with your car, heh!"
Now I rotated the tyres today and I was aware the rear ones are alot balder than the front ones but it only JUST has enough tread, but it isn't worth arguing so I'll need to pay the fine or they advised me my license would be suspended.
My question is can they fine you for bald tyres?

I googled this but couldn't find anything relevant in Australia.