I ran across an odd story today (on a web site not known for its trustworthiness) about well-known algorithm researcher Baruch Awerbuch's mysterious disappearance a year or two ago. His publication record also shuts down at about the same time.

I'm sure it's an unrelated coincidence, but in retrospect some of his titles start to sound a little sinister: "Collaboration of untrusting peers with changing interests", "Collaborate with strangers to find own preferences", "Tell me who I am".