To use the ignore button, click on the poster's name. This takes you to their personal page. Under the avatar, you can click a link to "ignore poster."

I regret that we have a troll who is known to long-term readers here as another manifestation of scottsmith, a notorious basher. Though this one continually responds to posts and seemingly has gone long and is trying to pump the stock, remember that pumpers are no more to be trusted than bashers.