Interesting write from 1999. One of the old-timers I knew used to keep something like $25000 in cash in his freezer ...
"I stand firmly by Lee and Webfather in their analysis that the government is a very real threat to YOUR business and that you should not be naive in thinking it could not happen to you. For pretty close to no reason at all, you can be thrown in jail and prosecuted facing a further prison sentence, seizure of your assets, closing down of your operation, and a frozen bank account.
I know many in the industry that have been around long enough that keep a considerable amount of cash handy in the event their assets are frozen. I highly recommend this. Maybe you'll win the court case (maybe not) but it is very difficult to survive with no money, your business frozen, server turned off, and so on.
So, even though historically the odds of beiong prosecuted under obscenity laws have been low for any individual in particular I believe that when tied in with the risk/reward analysis given by expected return it must be taken very seriously. "
http://www.buildinganempire.com/1999.html