The only possible negative effect on OC if the shall-issue permit bill becomes the bill of choice is the signs. Right now, there's very few "No Guns" signs. Once a CC law passes, you'll see more signs. All the bills allow private property owners to "post" their property, so we'll likely see many many more signs.... especially in urban liberal areas. Those signs must be obeyed by OCers as well as CCers. If the expreriences of other states is any guide, in about 6 mos to a year, the signs will slowly dwindle away.
But on the plus side, the laws set standards for the signs (now anything will suffice as a "No Guns" sign, as long as it says no guns). To be WI legal, a sign must be BLAZE fricken ORANGE, 8.5" X 11", and posted on each entrance. Signs NOT on building entrances, such as private parking lots or any other outdoor place, must be 11"X11", and also BLAZE ORANGE. They must contain the words "NO GUNS". A picture of a handgun with a circle/slash symbol won't do.