rollin:
I've always found it interesting that some readers comment on the actions and motivations of the characters, what they deserve or do not deserve and what they might do in the future, as if they were real. It's as if someone commented on an episode of Seinfeld by saying Jerry should really marry Elaine and can't understand why he doesn't---like it's Jerry's fault. Now that's fine with me because I think sub silentio they are really commenting on the story, but as literary commentary it is sometimes odd. So if someone says "he should have used the strap--she got off too lightly", that reflects either a criticism of the plot or maybe just the personal preferences of that reader. But as they say, "it's all good."
But aren't all these comments about characters' behavior and motivation understood to have been made within the fictional context of the story?
I'm rather flattered whenever a commenter treats a character of mine as an individual (albeit a fictional one) with his/her own attitudes and beliefs--because that's how I envision him/her, a character isn't supposed to be merely a literary version of myself.
IMHO it's certainly valid to speculate on whether or not the television character of Jerry Seinfeld should have married fellow character Elaine Benes, or whether he'll do so in their future, just as it's valid to speculate on whether or not Rhett Butler and his wife Scarlett were ever reunited following the conclusion to GONE WITH THE WIND.
If I'm discussing an author's characters in any in-depth manner, they've made an impression on me--which AFAIC is a positive reflection on his/her ability RE characterization...

--C.K.