Hi, so if you're harvesting in the next few days, that means a maximum of 3 to 6 days, I think nothing will happen, because the male flower sacs of a cannabis plant usually need 10 to 14 days from their formation to opening, depending on the growing conditions, the plant's genetics, and other environmental influences. But if you want to wait longer, then you have to remove them. Not because of seed formation, but the pollen can spread in the tent and fertilize future plants there, as well as the current ones. I would just carefully remove them, and that's it.