We have written many times in the past about the importance of Constitutional protections against unreasonable search and seizure. Without the protective requirement to establish probable cause, police could search any person for any reason and file criminal charges based on what they found.
Drug crimes are treated seriously by the state of Wisconsin. Most drug crimes involve simple possession of a small amount of illegal drugs such as marijuana, but suspects can be arrested for something as minor as being caught with drug paraphernalia like a bong. Then of course, there are the big drug crimes: trafficking and manufacturing.