Any person, firm, or corporation, their agents, servants, or employees, who shall, without first having obtained by ordinance from such municipal authorities, as hereinbefore provided, authority so to do, enter upon any of the streets, alleys, public parks or grounds of such cities and interfere with the surface thereof, or dig ditches, or obstruct the same in any way, or otherwise interfere therewith, shall be guilty of a misdemeanor for each day this act shall be thus violated, and upon conviction thereof shall be fined in any sum not exceeding one hundred dollars for each such offense: Provided, That in cities of the second and third class where street grades have been established property owners adjacent to such may fill in such streets to the center thereof so as to bring them up to such grade.