The legislature is free to pass a law changing the method of publication, but it has not done so. At the moment, the law provides for one method of satisfying the constitutional requirement of publication: designation of a date by the Secretary of State and public dissemination via publication in the newspaper of record. So long as this is the only method provided under the statutes, this is how publication must occur. Any attempt to give legislation the force of “law” without following the statutory provisions already in place is an attempt to bypass the publication requirement of the Wisconsin Constitution.
But, of course, all this talk about the LAW sort of requires that governments are inclined to abide by them. This government is not.