Then again, everyone is inspired by something, so that alone is not enough to demerit it. However, you don't have to be a genius to know the Saw movies are just gorefests for people who like to see other people being killed in creative ways. So it's not that surprising that the yukkuri-torturing community loves them.
^In Saw (2004) a dude has to cut off his leg or die (can't remember how). In Watchmen (1986) a dude has to cut off his hand or burn to death. In Mad Max (1979) a dude has to cut off his foot of get blown the fuck up.