I just got back from Texas after a month long "training" class for my new job. The job is with a very large x86 hw manufacturer we've all heard of - for better or (more likely) worse. The company is known for microscopic surveilance of workers - both on and off the job. Rules about URLs are enforced by some nannyware program whose name I forget, but get this: amiga.org is explicitly banned and attempts to access the url bring up a stern message straight from big brother himself;
"future attempts...to...access this url...resulting...in...termination...escorted....by security....from...the premises". etc, etc..
For the record, I tried to go to amiga.org on my lunch hour. It occured to me later why amiga.org is banned, and its not the reason you might think. Remember, this company is HQ'd in Texas, which is next to Mexico. "amiga.org" might be just as likely a url for a spanish-speaking pedophile as for an enthusiast of Amiga Computers. Thats my theory, anyway.. "atari.org", for example, worked fine. Pretty absurd, huh?
This is an example of one of the inherant weaknesses of filtering software, and also with speach recognition -- the inability to understand things like context, emotion, nuance and, in a way, common sense. These are things that simply cannot be converted into numbers.