He will let the stock run up and then try and make a few pennies off of the pull back when people cash in some profits. It seems pretty obvious that he is a short looking for small quick hits when the stock gets a little over bought. He seems to have about a 50% success rate.
Not an easy way to make money and the paperwork and taxes must be a bltch to do.
In addition i don't really think that there are enough people on these boards anymore that his posts would have any effect on peoples actions.