A simple, cheap drunk is Hawaiian Punch and Everclear. It's true that sugar masks the taste of alcohol, and you can get very, very (dangerously) drunk if you don't realize how much alcohol you're actually drinking.
I'm about to sound like an alcoholic in this thread, but no, just a once-was college student. When we threw parties, we'd make up jungle juice with a special strawberry-tangerine powder mix, Everclear, and Sprite. The Sprite is the secret ingredient. The whole mixture tastes like candy.
It was REALLY dangerous, one because it's delicious, but also because most party hosts would mix up a vodka-based jungle juice. People didn't realize they were drinking Everclear, so we had to put a big warning label on the container.