I frequent both far-right and far-left forums.
Those places ban and delete anything that goes against their mindset.
As a result, they keep on perpetuating the BS that gets posted there.
People don't learn anything. They stick with what is comfortable. They aren't challenged to face stark realities. Hugo, you can admit that Obama is a bit of a gun-grabbing socialist. Joe, you can admit Mccain opened up our borders and chose an idiot for veep. I would still be reciting pro-Bush rhetoric as I was in 2004, until someone posted some 911 clips and I learned what a lie that day was.
IMO it would ruin the board. Our traffic isn't high enough to warrant it, as well.