Don't listen to the trolls that tell you to visit the boxes with your phone. Unless you're amish, they will track you. Don't put on a beard with a mask over it. Don't set the boxes on fire, don't fill them with dog doo, don't use great stuff cans or bags of expanding post hole foam, or any other vandalism. All those things are what left-wing terrorists would do but they will not be prosecuted.
I suspect they will vandalize and accuse patriot monitors. They need proof of vote suppression to claim that is why they lost. Leave your phone in a faraday bag and use your old-school camera to monitor. Play fair and we will win