From what I understand, 2011 has been a good year for hackers and "hacktivists". Shortly after police claimed they had arrested 'Topiary', a prominent member of hacking groups 'LulzSec' and 'Anonymous', the group 'AntiSec' posted huge amounts of stolen police information in response.
Link to main Story:
http://news.cnet.com/8301-27080_3-20089054-245/antisec-hackers-post-stolen-police-data-a…