To quote them:
Here be GrieferWiki, where griefers and trolls can amass valuable
information and scripts to aid other griefers and trolls. If you want
to add an article, put the desired article name in search, click go,
then click the edit button on the next page.
This makes the intention of the side pretty clear, hu? There are some scripts online to use for various attacks, if they work - who knows. But taking a closer look at this site, if it is growing in the future, could be a valuable source of information about how a griefer ticks and what he's doing how.
Disclaimer: I don't endorse or like griefers and their doings.