I drive every day in Australia, thankfully not in peak hour but hundreds of km per week and I have never seen brake checking, didn't know it was a thing, had to

I drive every day in Australia, thankfully not in peak hour but hundreds of km per week and I have never seen brake checking, didn't know it was a thing, had to Google the term to find out what it means. I have noticed a lot of people failing to keep a safe distance from the car in front (tailgating), though, which is far stupider to me. Maybe the two are related?