what's general airflow in house? e.g. in mine it goes west to east 9 our of 10 days. or more... if your home's natural airflow pushes that way, you'll probably get a few regardless, but with doors closed or other precautions it should be minimal and of no concern.
two, you need to avoid contaminating it with your own behaviours... so when you do garden chores, always do teh bloom area first... never go back there after going into area with male plant. if oyu do, wash hands, maybe change your clothes, etc, LOL... get your work done, and just don't go back in there if you've worked with male plant later on.
i had a male plant "2 rooms away". i broke my protocol once (stupid shit) and i have a few seeds as a result. the plants i touched, have more than a few seeds, but still not a ton (maybe 20 in 6-8 oz? and other plants are 1/4th of that just from me walking by them). I went from male area and fiddled with a couple plants before i realized what i had done. Due to consistent age of seeds found, it's safe to say they all got fertilized around the same time and likely vast majority from that day, otherwise i'd have a range of matured and immature seeds if it were constantly happening.
Even with my fuckup, i got very few seeds. Air doesn't flow toward that room, naturally, though, so that helped too.
it will get on your hands, your hair your clothes and that will potentially pollinate a plant. The airflow creataed just from walking is enough to spread it far and wide. if you have a circulating fan on in male area, then it's all over you no matter how careful you think you are while in there ... ALL over you, lol.