Prepaid credit cards can only be bought with cash or a debit card.  If you have their debit card and PIN number you might as well go directly to the ATM and withdraw money there.

Battery acid. Wipe your hands on your jeans when you're done.

Mopeds are like fat girls.  They're a lot of fun to ride until a friend catches you on one.

That's a good plan.  You're right that you should go for cheap ingredients over quality when selling to college kids.  Most students won't know the difference, and the ones that do will be too drunk to care after the second shot.  I recommend you be really careful with this operation, though.  Eventually some drunk student is going to get picked up by campus police and run his mouth, probably saying something like "What are you messhing with me for, ossifer?  I only had two beersh.  The guy in room 604 is running a fugging bar out of his dorm room, selling drinks to half the campus.  Arrest him." 

If you get caught, you need to make it look like you were just sharing drinks with a few friends.  That means you don't keep a big supply of cups in your dorm, you don't keep more than two bottles in your dorm, and for sure you don't keep a big stack of money in your dorm.  Those things just scream "intent to sell" and that's real bad, as in possible jail time bad.  You also might want to set up a little shop selling ramen and candy just as a front to explain the constant flow of traffic into your room.  It doesn't have to make money just as long as it gives you a cover story.  And don't steal the cups.  You've got a good thing going here, and there's no need to take the risk of ruining it by getting caught at petty theft.

As Bling pointed out, Farmer John has a shotgun.  Farmer John also used an old Viet Cong trick and booby-trapped his patch with bullets in pipes just barely sticking up out of the ground and the primer of the bullets resting on nail points.    Farmer John also raises hogs, so there's no need to go to the trouble of burying bodies, not when there's hungry piggies to feed.

"I stayed in New Orleans for Katrina and all I got was a plasma screen TV, a Cadillac and this lousy T-shirt."

The website appears to be legit; USAToday posted a link to it.  I got something like $15 on a similar class-action suit about ten years ago.  Some music companies had to pay the settlement because they got caught conspiring to raise prices when they started putting music on CDs, or something like that.