Using Perl operators in void context is like calling up the reference desk of your local library and asking, "What's the average bodily temperature of a healthy aardvark on the moon of Pluto during the rainy season?" The poor librarian will have to find a large enough population of aardvarks to have a control set and a test set, not to mention mounting an expedition to Pluto with space thermometers and the like. We won't even get into the fact that wet aardvarks in space are surly! When the researcher finally returns to the phone to say, "Slightly lower than on earth," you'll say. "Thanks, but I just wanted to know if this was the right phone number."

In other words, don't do a bunch of work just to throw it away.