Why don't you stop worrying about what other investors are doing with their money and concentrate on your own. Maybe then you wouldn't be so bothered by a little bid/ask fluctuations in this stock. And you wouldn't feel the need to tell other people not to buy. How idiotic.
By the way, many people don't pay commission on every trade. A lot of penny traders and day traders have accounts that allow them unlimited free trades as long as they maintain a certain cash balance in their account. Freaking newbie.
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