Pollen from a male marijuana plant can travel by wind several miles, so if you got seeds know that there is a male marijuana plant some ware, and there's nothing you can do about it, unless you find one of your plants that's a hermi, then it could be what's pollinating it, throwing the plant out wont help if it's a wild male some ware, because all your plants will get pollinated anyway. All you can do is either move the plants were there would be no pollen, or just face facts and allow them to be seeded. Unless you can find the male, but I mean I doubt you will.