A year ago me and a friend of mine, who was 15 at the time, bought a bunch of forties using his older brother's I.D.
We just put his hood up, threw a cigarette behind his ear, and they sold them to us, no problem. Him and his brother didn't even look all that alike.
But yeah, I keep going back and forth about the I.D. thing. My brother turns 21 in nine months, so I may just hold out til then, but there's a liquor store that's literally a minute walk from my house and it keeps tempting me.