Here's an easy way to "protest" with the people in Madison and elsewhere: Boycott thefuckout of all these companies. IF there is something made by one of these companies you cannot live without, you shouldn't be thinking about protests, anyway. (Think about delicious anus-burgers harvested by ill-paid, ill-treated illegal migrant labor in the slaughterhouses of the Midwest.)
Wisconsin Realtors
Koch Industries (obvs.)
Wal-Mart
Tavern League of Wisconsin
AT&T
Brawny paper towels
Dixie cups
Georgia-Pacific lumber
Stainmaster carpet
Lycra
Also quit buying gasoline and using natural gas; the Kochs own pipelines everywhere. Go solar and get a Nissan Volt, or better yet, don't have a car at all and rent one (a Hybrid or EV) for road trips. Give a hoot.
I have a problem. I notes the a Koch brother has been underwriting one of my favorite shows on PBS. This is a real dilemma for me.
I haven't stepped into a Walmart in over 20 years. I stopped going when they were busted for selling stuffed labeled "Made in America" when it wasn't. Man, have times changed.