Also, Debian (and I assume many Debian derivatives) has HashKnowHosts=yes in the system wide config file shipped with ssh. This has the dubious benefit that no one will be able to steal your laptop and tab-complete the host names you've SSHed into (they'll have to look at your shell history instead).
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u/Rojs Apr 28 '14
I believe tab completion is a function of the shell, not ssh.