Once upon a time — between 1925 and 1931, to be precise — the residents of Miami, lacking giant Hummers, boarded streetcars to get around the city. Then car companies lobbied for the destruction of the rails, and the on-street transit system was no more. Now Mayor Manny Diaz wants to bring the streetcar back. Maybe you like it, maybe you hate it, but Mayor Diaz's plan to build a $200-million system connecting Little Haiti, the Design District, Wynwood, and downtown is one of those issues that gets city activists fired up. Those on the pro-streetcar side tend to see it as the eco-friendly, neo-urban kick-in-the-pants the otherwise car-dominated town needs to move it into the 21st Century. But not so fast: Opponents such as Norman Braman (see Best Citizen) think it's a big, fat waste of money. And Commissioner Marc Sarnoff, elected on an anti-streetcar platform, has called it a "glorified bus." So far, the scale seems to be tipping in the streetcar's favor. But don't let the politicians decide the matter. If you have an opinion, go ahead and clamor for it. That's what democracy is all about.