If you've got men and don't want seeds or pollen from them, get them out of there, either isolate them until you're certain or end their growing. If you're seeing spade shaped objects, and they will eventually be clumps of them like grapes, then you definitely know they gotta move or die. The little spade will eventually crack open and you'll see the pollen and it will take to the air and go everywhere.
Best of luck happy growing.