Some activists who oppose Gov. Scott Walker's plans to eliminate most of the collective bargaining rights of public employees in the state may protest by placing stickers on products at grocery stores that are made by companies whose executives contributed to Walker's campaign, according to the Wisconsin Grocers Association.

The WGA issued an alert to its members that the anti-Scott Walker sticker campaign is being planned for May 1.

"Products they are encouraging to be stickered include: Angel Soft toilet paper, Johnsonville Brats, Sargento Cheese and Coors beer," the WGA said.

The Johnsonville Brats protest stickers say, "These Brats Bust Unions!"

It is unclear who is behind the protests, said Brandon Scholz, WGA president and chief executive officer, but the WGA received an e-mail from a "Cassie Wagler" encouraging the anti-Walker sticker protest.

"You don't have to be in Madison or NYC to participate!" the Wagler e-mail says. "You can be anywhere where there are stores. Here's the deal: the struggle in Wisconsin is not over. It has just changed course. One of the current tactics is a boycott of the companies that donated to the Scott Walker campaign last year. No matter where we live, we can support Wisconsinites, spread the word about the boycott, and let these companies know that we are taking action against them."

Placing stickers on a product in a store without permission of the store owner is illegal, Scholz said. If the protests occur, retailers must decide how they want to handle it, but they could call police if they decide that is the appropriate action, he said.

"You're defacing the product," Scholz said. "These products are the property of the retailers. They paid money for it. If you want to protest, fine, go on the street and grab a bullhorn, but don't go damage to somebody's business and cost them money."

Most retailers probably do not want to get into a big confrontation that creates a disturbance for other shoppers, he said.

Scholz said he doubts the anti-Walker sticker campaign has significant support and participation, but the WGA wants to prepare its members.

 "I don't think it's got any traction," he said. "(To do the anti-Walker sticker protest) you have to download the image, figure out how to make it into a sticker and then you have to break the law."

The Wagler e-mail said the protestors plan to take pictures of the stickers on products at grocery stores and will post them at stickittowalker.tumblr.com.

"When we've amassed photos we will send them to Koch Industries, Johnsonville, Sargento, Coors, Scott Walker and members of the media," the e-mail said.

Later this morning, leaders of the Racine Tea Party announced a "buy-cott" to support any businesses targeted by the anti-Walker stickers.

"We encourage all citizens to patronize businesses targeted by union boycotts and intimidation - or on lists passed around for that purpose. We encourage all citizens to target their purchase of products to businesses targeted by union boycotts and intimidation," the Tea Party leaders said in an e-mail to BizTimes.