Facebook users offered free spam 'firewall'

Security vendor Websense if offering Facebook users and businesses a new free 'firewall' service that monitors their pages for malicious posts, links and spam.
Defensio 2.0 checks all posts to Facebook in real time against Websense's ThreatSeeker Network, a database of problem URLs, before deciding whether to categorise a post as malicious or unwanted. This also draws from data gathered by US ISP Radialpoint and URL shortening service bit.ly before performing further heuristic analysis as a final check.
If a bad post is detected, the system logs and informs the user who makes the final decision. As with the original Defensio system - acquired a year ago when Websense bought the company of the same name - it can also monitor web pages for rogue posting, pre-emptively blocking those it deems unwanted.
Fonte : http://www.networkworld.com