Good examples of "extreme security"?

[Black Ops Security <x () blackopssec com>]

What are some good examples of "extreme infosec"?  By extreme infosec, I 
am referring to things like dropping ALL traffic to your web server from 
S. Korea and China because of the spam, probes, unauthorized access 
attempts, etc.

"Extreme infosec" should not be confused with "stupid infosec" - ex. 
whatever the TSA is doing, or, trying to encrypt your whole PS3 hard 
drive with PGPDisk.

x
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