For MRT1890, yeah, I'd say there is a pretty good chance that pollen from a dried mature hermie could be viable after a week.
I wouldn't say its all that likely that pollen will get on your female plants just from smoking the hermie, or from your hands, but how hard is it to take the hermie plant elsewhere and wash your hands before handling your female growing plants?
Why take chances? If you don't want seeds get rid of the male flowers, and clean up after them.
For Arab Kush, individual pollen grains can literally be carried for miles by the wind.
For this reason outdoor plants are always at risk for getting fertilized by wild hemp plants or someone's unculled male, and in fact, in some places there are so many wild plants, hemp plants or unculled males, that you basically can't grow seedlessly outside.