Despite misunderstandings that it relates to firearms or drugs, "30 on 30" is an affirmation used after expressing dissatisfaction with the government, encapsulating the spirit of defiance, and rebellion of authority figures.
"I'M NOT A BIG FAN OF THE GOVERNMENT"
"30 on 30"
"Man... congress isn't doing anything right..."
"30 on 30"
"I FUCKING HATE TAXES"
"30-30-30"