It has already effected change over and over again in Grafton, NH. The idea isn't to be a voter, though. It is to be much more than a voter. Be a candidate, manage a pro-liberty candidates campaign, be the on the board of a pro-liberty organization, be part of the production team of a pro-liberty TV show, be a pro-liberty writer for an already existing newspaper, write pro-liberty LTE and so on. Find what works for you and do it but just voting is thinking too small.
Laws were passed because pro-liberty legislatures wrote the bills, spoke about the bills, found the votes for the bills and made sure the bills passed. A man had 18 marijuana plants but because we were able to change the law, jury nullification was mentioned by the judge. The jury, lead by a FSPer, found the man not guilty.