I don't see what the big deal is. If what you're saying is true and 1 share is able to drive the price down, in that situation it has no real impact on you or any other shareholders. It doesn't hinder your ability to buy/sell at an accurate, current market price, because if you sold an order of 'x' size at market at the same time you'd get the same fill as the person ''driving'' it down. What we're talking about here is merely the shareholders' feelings, in seeing the stock close flat as opposed to +1.5% or something. The next at market buy during the next trading day will take it right back up, and if not, it wasn't really supposed to be there in the first place.
Regarding your other comment about the market interpretation of news, I would respectfully suggest that it's maybe your interpretation of what's ''good'' that needs adjustment. No matter how determined, no single ''manipulator'' has the need or the ability to stand in front of a freight train. If the share price doesn't take off on ''good news'', it's probably just not good news.
MNS Price at posting:
33.5¢ Sentiment: None Disclosure: Not Held