If you think that the arguments made in that booklet make sense to you than that explains the rest of what you said. There has been a lot of hyperbole used in regards to the internet and in my mind it is incredibly counterproductive. Again the asifa booklet is exhibit A.
You are making a lot of assumptions about my business and my views on the subject which are not true. In my mind its not a one size fits all solution – to me kids, teens, adults at home and adults at work all need different levels of filtration (or in the case of kids no internet at all). Also various families will have different needs – ie. someone in medical school (or in college in general) will have a very difficult time with a filter. Anyone who runs a business which is involved in developing/testing software will tell you that filters will not work for them for obvious reasons and it has nothing to do with viewing inappropriate sites.