A true story (that anotherone can substantiate)

During the great Midwestern flood of '93 a deranged alcoholic blew up a levee in Quincy to prevent his wife from getting home from Missouri and also created an excuse for himself from going to work.

Resulted in the flooding of some five hundred acres of farm landland on the Illinois side of the Mississippi river.
Was later convicted of some bizzare federal crime as a result of that a few years later.

Another answer to the question:

Who would do such a thing?