Okay, the Dante Inferno thing makes sense then. And I didn't know about the curse for Tea Time, that would make more sense then.
As for the Saints: A) They have one friend who helps them out for awhile. After he is gone their dad joins them for one kill.
B) it's implied that they grow to have a greater purpose of being permanent vigilantes.
That didn't happen. At all. The movie ends with people talking about them and suggestions that it could happen but the sequel makes it clear that after the events of the movie they leave the country and just live boring lives for years until someone provokes them.
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(Maniac64 at work)
Guns don't kill people, Kinder eggs do. I saw it in a post on GameFAQs. ~FAHtastic