i have done some of these and i'm sure JP and others have. as long as the queen is good and the hive looks healthy, i take them. any comb that looks abandoned, i toss. i don't keep the honey. any comb that has brood, i keep.
some of the exterminators on here can probably tell you better than i, but i think what they use must break down pretty quickly. the ones that have been dusted, i don't touch. that stuff seems to last forever and the hive is usually not healthy.