User blog comment:AlexHawks/Even more stuff you might find usefull./@comment-95.248.243.9-20130310140746/@comment-24.16.252.102-20130310202749

there's not really any reason for Riot to program it so you can't, since you'd get zapped by the fountain laser if you're not careful.

and if you're that far into the enemy's base, you're likely about to win or going to die before you can buy anything, so it's kind of a moot point