Flash has a security issue where a hacker can take control of your microphone
and/or webcam just by your click on a link. The issue affects Flash across all
platforms and it won't be fixed until the next version of Flash, Flash 10.
To protect yourself in the meantime, you need to edit your Flash settings to deny
Flash access to your webcam and microphone. The link below gives the long
explanation on how to do this. The short explanation is find a Flash video on a
web page. Right-click on the Flash and select "Settings". You'll see various tabs
with icons that almost no sense. Click on the various tabs until you find the
panel that has an option regarding access to your microphone and webcam. Choose
the "always deny" option and you'll be protected.