In real world scenarios there are situations where photos contain both vital sharp areas, and areas where parts of your subject are out of focus. High f-stop and smart shooting plan can minimize this, but often can't elliminate completely.
So disabling entire photo during texture generation is not an option.
I know that with enough manual masking, areas out of focus can be excluded from texturing, but most of them do not actually affect texturing, only some do, so perhaps there are ways to point which photo contributed blur in the texture, or have PS help disregard blurry photo areas (blur-aware texturing algorithm, masking tool etc.)
-Andrew