Say what you want about Microsoft, but this is pretty cool.
"Users of Microsoft's Messenger email service will be able to report suspected sexual predators directly to the police at the click of a mouse. In an attempt to protect the 11 million users of the service from potential abusers, the software giant has struck up a partnership with the UK government-backed Child Exploitation & Online Protection Centre.
Microsoft will add a "report abuse" icon to Messenger that will link any users worried about their anonymous internet buddies directly to online police services." - Guardian Unlimited
Although the potential for abuse of the report abuse feature is pretty freaking high.