Outhouses and horse manure would make Frontierland more convincing too, but they aren't there for a reason. The wires WOULD make it more authentic, but they are ugly. New subdivisions bury their utility lines for many reasons. One of those reasons is that all of those wires above ground are unsightly. I have seen the wires that run the Blue Line Metro Rail in Long Beach. They are ugly, especially along Long Beach Blvd. Sure, they're necessary and I'm not suggesting for a minute they should change the Blue Line. What I am saying is that Disney does NOT need to hang ugly wires above the street if they do actually build the trolley system.
No matter what they do, someone will complain. I am not complaining about potential wires. I am just stating that my preference would be for them not to have wires. I will not cancel my AP or start a protest thread if they are there. And, since I prefer no wires, I would rather have people complain about no wires than have to look at them every time I visit DCA.