I heard that he died, if we are talking about the same person
Probably the same person. A shame if he has. I just googled him and didn't see any death notice. Nor did I see anything recent from him.
Great tool for law enforcement to monitor all the gremlins who have surrendered all their rights to privacy.
I know people who say the same, although it's easy enough for serious spooks etc to monitor someone anyway if they want to, social media or not. Human intelligence is still always preferable.
Several wrongly accused people have been found innocent in sexual offences cases because of things their false accuser has posted online (usually on Facebook) that make it clear the person they accused is innocent.
With social media it pays to be careful what you say anyway; keeping ones digital footprint clean is both common sense and important. I always check up on job applicants' facebook page/twitter feed and have thrown a few applications away due to things they've put online.