Our student union is rather notorious for leaving 7-10s as well...we'll have nights where i'll see the amount of 7-10s in the double digits (with 4 bowlers a lane and 10 lanes, that's a lot) I left 5 on one fateful night, that was definitely a FUN experience...
Funny story actually, a friend of mine bowling during my freshman year left a 7-10, picked it up, and then left it again on the very next ball. So of course everybody crowds around him to see if he'll pick it up again. Well...the ball was in the ditch at the arrows and everybody was on the floor laughing, even the guy who left it. Good times.
--------------------
Andrew Loose
Illinois State University Men's Bowling Team