in-your-face thuggery the Big O has come to expect from his devotees, I strongly recommend some chivalric expectations. Meaning? If you see harassment either before one gets to the polling center or as voters leave, discern the situation, and decide on the brave thing: escort and befriend anyone you see being given a hard time.
You don't need to don your rapier - although a rapier wit may be helpful - nor go looking for trouble and throw yourself into the fray. Just keep a weather eye about you.
After all, you never know about these BACCHAE types, do you?