Is killerguides.net Safe?

They offer guides on various MMOs, but all of them are created at the release of the MMO and are completely outdated with large quantities of incorrect information. Many of the guides exist for games that are dead and gone, but they still sell them. They're all massively overpriced, as if that weren't enough. There's nothing you can find in these guides that you won't find but better with a quick google search or question on a message board, and you'll save yourself FORTY DOLLARS PER GUIDE. They're blatantly overpriced to sell the bundles that seem like a deal in comparison, but it's just a scam either way when they're just guides made from information on generic information sites like gamefaqs. These aren't experts or anything, they're just con artists.