I had some of those sacs, all over three different plants of two different strains, and I let them grow to fruition. No seeds, no problems. In fact, I think the pot may actually be *better* than the previous crop. Perhaps the strain they endured that caused the sacs (3 days of high heat, no ventilation and virtually no light) also caused increased resin production in a desperate attempt to breed a new generation. Glad as hell I didn't cut 'em down, or I'd have a pound less pot.

BTW, when I cut open a couple of those sacs, I found a viscous juicy fluid, not pollen. Dunno what that deal is, but I'm not gonna complain, seeing as it all worked out great.