Those with guilty secrets can always save to floppy, put the floppies in a safety deposit box and use one of the scrubber programs to eliminate all traces from the hard drive.
As for the rest of us, what have we got to hide from officialdom? Well, I'm paranoid about hackers getting into my PC because someone set up a locked file 500 Megs big on one of my partitions. Lord only knows what kind of !!!!! they kept in it. One of the trojans I found in my system traced back to the FBI. What were THEY doing in my PC? And in case the thought police found the file and asked for the key, well I guess I'd end up in jail eh?
Folder Guard and ZoneAlarm do it for me.
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Through difficulties to the cinema