"It has nailed a number of major accounts, including The Verge, USA Today, Reuters and The Daily Dot."

http://www.buzzfeed.com/ryanhatesthis/hacker-group-exploits-security-hole-in-tumblr

Just a prank? Or do the hackers actually want something?

 Seems like a prank. The nerds won, and now the other nerds want to bring the winning nerds down. No?

That's what it seems like. Which is too bad.

If they're going to do something illegal it would be nice if they actually had something to say.