Your opinion on those movies can therefore be completely disregarded. How can you have such a strong opinion of something that you've only seen 30 minutes of, or not seen at all?
Saw 4 and 5 are fairly weak (particularly 5), but "horse crap"? Nowhere near as bad as that, if you want horse crap then i suggest you look at some of the gems that are being churned out on the Horror Channel or SyFy, compared to those films the Saw sequels are Citizen Kane! lol.
It always amuses me when i read people saying that people who make/watch these films are "sick" or "twisted". It's called the "horror" genre for a reason, you're there to be horrified by what you're watching, if you don't like it then you're watching the wrong genre of film.