Yeah I know, the deepnet thing wasn't for you, I was replying to something Stevie said.
Wordpress (and other blogs) pages are still indexed even if the links in the comments aren't followed and Google can still find the sites those people were linking to because if they're blog spamming to get links they'll most likely be link dropping elsewhere so the bot will stil find and index them. Your wordpress being nofollow is unlikely to stop other sites being indexed.
Why would they ignore something they invented, that doesn't make sense. It was invented to discourage spam and it still does that job. The people who were doing the spamming are still finding ways to get their sites indexed, they're just not spamming blogs as much, so it doesn't affect the content of the index and blog owners have less blam to deal with.
Nofollow isn't going anywhere IMO.