<18

This has probably been asked but i couldn't find it.

How do y'all prove that you're older than 18 like for random police business (i.e. wrong place wrong time)
Like when they ask for I.D and you dont have it what do you all show?
Last time i didn't have one i got chewed out by the cop and he kept accusing me of lying.
All i had was my college I.D. so he got all pissy.

help?

try not to be at the wrong place at the wrong time.. I've been there many times though, college i.d works fine. Usually they'll run your name and address. As long as you're not in their criminal system, you're fine. Don't lie, be cool.