Any time that any client of Ancestry looks at information which that client is authorized to look at, using the privacy mechanisms of Ancestry, that private information is transmitted in the clear. There is no good reason for transmitting that private information in the clear but Ancestry has chosen for reasons which it has not explained to NOT take the elementary precaution of encrypting the transmissions, even though doing so means that it has to educate its users in how to turn OFF browser security. Moreover every query reveals information about the requester, which is presumably why search engines use https even though the information which is returned is not itself private.
I am just trying to find a community that I can join to raise this issue. Obviously the best community would be among Ancestry.com clients, since they are the ones whose privacy is being violated, but it is understandable that Ancestry does not provide any mechanism by which such a focus group can be established using its facilities. So I am, in essence, advertising to a number of communities of people who understand the value of encrypting web communications, in hopes that someone will direct me to a more appropriate forum.