I make rare exceptions. About the only time I do it is when I notice my opponent is doing it. (Not because I care they’re doing it to me or about karma, but I regard it as a moral imperative to defect against defectors, and if they care about karma enough to try it against me, I’m going to retaliate on the grounds that it will probably hurt them as much as they hoped it would hurt me.)
I make rare exceptions. About the only time I do it is when I notice my opponent is doing it. (Not because I care they’re doing it to me or about karma, but I regard it as a moral imperative to defect against defectors, and if they care about karma enough to try it against me, I’m going to retaliate on the grounds that it will probably hurt them as much as they hoped it would hurt me.)