I'm planning on having a group of people over in a few weeks with digestive tracts unaccustomed to live yeast. Now we all know the result of such digestive tracts combined with homebrew. If I were to kill the yeast somehow, would the dead yeast wreak the same havoc on my home's atmosphere as live yeast? If no, how do I go about killing the yeast? Campden tablets? If so, how many? Thanks.