I wouldn't say that most people on this board don't trade. There is some long term investors that won't sell until who knows when and there are traders, be it swing or day traders. Though I don't like shorting I've done it in the past but only as a day trade since that's mostly what I do with SLW as a stock but swing trade the warrants. And this is an excellent stock to day trade.
And how can you use the "oppertunity" to buy more at lower prices when you haven't sold what you got? Unless you keep putting in money out of your own pocket.
Different people have different ways of making money and buying and holding long position no matter what isn't a best choice all the time. And if one buys any stock and plans on holding it for years why bother keep posting on the forums since that investor doesn't or shouldn't care what each day brings for he is in it for the long haul.
You're right, it's probably more like 50/50. As for the rest of your post, Couplover's latest post (#26842) responds much more eloquently than I ever could. The one point he didn't cover was your last sentence - as someone else once said, these boards are not just for info, but also for entertainment; the longs on this board get a good laugh out of the traders that come on this board whining about how the stock didn't go in the direction they bet on for that day and some of us also enjoy refuting other posters' BS.