btc-arbs admin was tracked down and now he cant be so sure about his and his family security

You have a link for that?

Check out their forum thread https://bitcointalk.org/index.php?topic=474787.0
admin is now forced to refund all members, so if you anybody didnt know, you can now get your money back (but be patient this will take long),

also check this document so that everybody else can see progress of refunds https://docs.google.com/spreadsheets/d/1lSUi0_1bqe0sv5XI4EvXWPcWI7fwnJbFQY-kMsYxp10/edit#gid=1324696940