I think the blog title is a bit sensational here. 'Patent trolls', at least as I understand the term, do not produce products. That's the whole point: they're trolls because they do nothing but sue people, without adding any value themselves. Twin Peaks does produce products, so they aren't a troll. Red Hat has just found an interesting way to counter-sue in a fairly ordinary patent dispute.

The fact that Twin Peaks clearly waited until Gluster had been acquired by Red Hat before filing doesn't make it a troll.