A message circulating on Facebook claims to take users to a video recorded by Robin Williams to say goodbye before his untimely death; this is another cybercriminal attempt to exploit user curiosity to fill their pockets.There are multiple campaigns running at the time and in most of the cases crooks seem to try to convince users to complete online surveys, for which scammers receive a commission; but other variants may lead to websites serving malicious toolbars and browser plug…