I love bash. I love unix/linux. I love that bash gives you that kind of power. I love the fact that he figured out a nifty way of doing this.

But please please please please with all the love of America, baseball, and apple pie, don't change the default behavior of basic unix commands.

Otherwise you force people into writing nonsense like this:

MV=/usr/bin/mv

${MV} ${FILE1} ${FILE2}