To be honest, I haven't read every post in this thread, but I want to give my opinion anyway. I feel that resigning is more of a compliment to the other players skill, insight of the game or his ability to spot and (a)buse my blunder than it is a direct insult when someone isn't resigning (even in a losing posistion).
Furthermore, at the level of chess I'm playing right now (I'd say advanced beginner), I still learn a lot by continue playing in a lost position (just to see how the opposing player will crush me, or to see if I can still save the game). I'll resign when I have the feeling there is nothing left to learn. If things are really bad for me, I generally ask the opposing player if he minds playing on (thereby satisfying his hunger for my resignation)
I'm curious if any of the people who get very annoyed has ever said to a much weaker opponent who plays on in a hopeless situation something like: I don't feel like I need the practice in this position, so you might want to resign.
Does the sanctity of good sportsmanship go both ways? That is, does the "injured" player have any obligation to treat the person doing the injury as if he's acting in good faith? Is it really good sportsmanship to say that when someone does something that annoys me, I'm never going to play against that person again because I know he is doing it for a bad reason?
If the other person is refusing to resign just to be irritating, then obviously that person is a jackass and should not be playing with others. But despite the certainty some have that this is always or nearly always the motivation for this behavior, other than assertions that this is true, I've never seen any indication of it. Every explanation I've seen given for why someone would continue playing has been based on good faith, even if you might disagree with it. Is everyone of these people lying about their reasons?
It may well be a law of the chess universe that playing on is bad form. But if that is the case, I would guess that most people who do it do so out of ignorance of the "law," which may not be an excuse in court, but certainly defeats a claim of willfull misbehavior.
The original post in this latest of so many threads on this topic was from someone who was particularly annoyed with a person not resigning in blitz games. I don't think there is anyone who has argued that that position is valid, even the strongest advocate of the resign-immediately side. That seems to indicate that at least some of the righteous indignation is not justified.
Just to be clear: I'm not trying to justify any particular behavior. I'm trying to open the discussion to one of what is the appropriate response to behavior someone thinks is unsportsmanlike.
For the record, sometimes I resign rather quickly even against weaker players when I have blundered away a piece. Sometimes when I'm way up in material, my opponent does not resign, and it has yet to strike me that he or she is doing it to annoy me. More than once I have said to my opponent that there's no hope of me winning here and I'm happy to resign. I tend to communicate with other people while I'm playing, and try to keep the situation friendly. I don't like playing with jerks, whether they beat me or lose to me. Losers and weak players don't have a monopoly on poor sportsmanship.