Hey I'm from Ireland and recently got a ticket for underage drinking. I'm not sure when I'll be back in the USA so should I pay it?

We ran from a dickhead taxi driver who wanted us to pay for his cracked window. When I got caught by the police I had a can of Joose in my hand and they asked what age I was (I’m 20). I can’t believe this absolute horseshit law. Will i more or less be fucked when I enter the USA next time?