If it's LulzSec, as the article assumes, I would hope they have good reasons to do so.
LulzSec is a group of hackers searching for recognition. By chasing them they are giving them more publicity.
How expensive is it to spin up a VPS and start poisoning data centers? Three racks to take down one site? It would be a nightmare of a whack-a-mole game on a global scale.
If it's LulzSec, as the article assumes, I would hope they have good reasons to do so. LulzSec is a group of hackers searching for recognition. By chasing them they are giving them more publicity.