Not exactly Harvard's proudest moment - but oh, what a wonderful social hack... Harvard fans at this year's Harvard-Yale football game were conned into spelling out "We Suck!" by a bunch of cleverly-disguised Yale students.
Impressive.
A year of planning and effort went into that little caper. The Yale Daily News report has some interesting details, and HarvardSucks.org has the video. Of course, Harvard has a few hacks of its own on tap, as you'll discover if you make the mistake of entering HarvardSucks.org's "leave a comment" page with your browser's Javascript turned on.
Once upon a time, people like were actively recruited to serve their country in the OSS...








ph34r teh 133+ 1\/y 133g h4z0r5...
...nah, i'd still be more worried about MIT. Harvard and Yale can burn each other, MIT can burn Vegas. Ouch.
Oops, I meant "h4×0r5"... "h4z0r5" would be the frat boys, I guess... 8)
"Once upon a time, people like were actively recruited to serve their country in the OSS..."
Still are.
MIT already did hack the Harvard-Yale game. In 1982. With a similar (but G-rated) flashcard stunt, and -- more memorably -- a weather balloon which inflated out of the ground near the 50-yard line.
See items 6 and 7 of this list.
There've been others, going back at least to 1947.