A Great Prank to Play on April Fools' Day

There are so many reasons why it just wasn't cool.
To your point, mice can chew through electronic cables. But to further complicate things, they can find a nice human-unreachable spot (Say within a wall) and reproduce, creating more of a pest problem.
Then of course employee morale, with mice running around you've got scared employees on their chairs and desks (Pussies). Not to mention the greater problem of being flea carriers which will spread those suckers in a carpeted office environment like no tomorrow.

In conclusion, don't be a moron and try this at work. Ever. Well, unless you work in a pet store. Then whatever, haha.