I don't really have an epic tale surrounding Keystone, but one mildly amusing anecdote in which this beer does play a role.
Freshman year at college, my roommate and I are surprised with a routine inspection by the fire department. We probably got notice that it was coming and I wiped my ### with it, I don't know. I just remember not expecting it when we got a knock on the door and three people came in to search for violations. First, we got socked with having a batting helmet over the smoke detector, 95% of our door and walls covered on all sides with magazine cutouts, "evidence of careless smoking," and an illegal hot plate, among other violations. The fire marshal (or whoever TF he was) told us we had the most violations of any room he'd ever evaluated (woo hoo!)
The kicker was when they slid open the accordion-style doors to our closet and found a 3 foot Graffix bong and over 1,000 empty cans of Keystone. They were flabbergasted - we had them stacked neatly about 35 across, 5 high, and 6-7 rows deep. It took up the bulk of the closet - our clothes were largely in suitcases or on the floor. Two of the firemen were laughing (one actually said : "Who TF drinks that much Keystone?) while the marshal, who was not laughing, made us drag every one of them out and start loading them into garbage bags. Our RA was in the hallway looking like he'd seen a ghost. As we got done packing them all up (along with the bong, which they confiscated,) I thought the closet was empty. Then, I hear one of the firemen say : "Ohhhh, HERE'S our street sign !" and pull a metal street sign out of the closet. The Rutgers-Busch Campus fire station was on a road called Titsworth Place. Naturally, we'd gone out at 3 AM drunk one night and ripped the sign off the intersection and brought it back to our dorm. They took that too.