To vote or not to vote

The electronic voting booth screen in my precinct has a button you can press at the bottom left hand corner - it says (roughly) "abstain from voting."

Should someone even bother schlepping over to the voting station if they're just going to exercise there right not to vote? Or is it a strong statement? Now there's a record of people who came to vote just to say they're not endorsing any candidate.

-Melissa