The most important being guests health, but others are almost as important.
Guests anonymity/continued freedom being right up there as well.
What I thought could possibly happen seems to have begun.
Daphne offers very sound advice in her post from 1/19 (on the linked Boston board post).
Essentially as should be all hobby participants SOP...........STFU about 'us' in any/every situation regarding outsiders questions.  
As a party host I will be looking at this with great scrutiny

I still attend some small private ones.

But, have been to a few larger hx ones that are invite only. Man, soon as I left and got to my car I used clorox wipes on arms and hands and face. Brought and extra shirt just in case and switched it out before I drove off.
 

We all need to be careful and respectful but there are alot of guys who really don't give a shit!