Well, I've found that movies like Saw/The Grudge 2/Texas Chainsaw Massacre (remake)/etc. are very popular among people your age Gee (15-17 I'm assuming). I think kids put alot of stock into these movies... even when/where there is none. If you know what I mean. A movie being "good" or "thought provoking" to a 16 year old doesn't exactly mean much to me nowadays, but that's just me.
Saw seems repetitive, and lacking anything other than "shock value". Why does this Jigsaw character feel these people "should" die? Because they're crude, uncaring, selfish, (etc)?... well, then I think half of the worlds population should be getting killed off. The movie(s) just seem so worthless to me, other than some nifty torture tools.