If your thing is fighting city hall in the good old American way, the chance to do so over Carson Street downtown is available via petition.Make that dueling petitions. Of course, Carson City’s City Hall hasn’t made a final decision as the Board of Supervisors keeps gathering information. But that’s the point. If you want to get on the record, you can sign a petition on the issue.People can sign one at Comma Coffee, 312 S. Carson St., generally favoring a plan to make Carson traffic two lanes, allow parallel parking and remove wrought-iron fences between the sidewalk and roadway.Or …