The decentralized nature of online conversations often makes it easier to manipulate public opinion, both domestically and globally. Regimes that once relied on centralized systems of media control can now deliver ideological messages more subtly, with the help of little-known intermediaries like anonymous commenters on websites.
There is no doubt that the Internet brims with spamming, scamming and identity fraud. Having someone wipe out your hard drive or bank account has never been easier, and the tools for committing electronic mischief on your enemies are cheap and widely accessible.
For all its shortcomings, Wikipedia does have strong governance and deliberative mechanisms; anyone who has ever followed discussions on Wikipedia's mailing lists will confirm that its moderators and administrators openly discuss controversial issues on a regular basis.
One possible future for WikiLeaks is to morph into a gigantic media intermediary - perhaps, even something of a clearing house for investigative reporting - where even low-level leaks would be matched with the appropriate journalists to pursue and report on them and, perhaps, even with appropriate NGOs to advocate on their causes.