Yahoo has announced they will increase security on all of their servers, and promises that by March of next year, all users will have to option to and data that travels to or from Yahoo’s servers. In my opinion, this is a desirable feature, although I think Yahoo is doing this simply to make people more comfortable. Does Yahoo care if an email with a link to a cute puppy video gets intercepted by the NSA? Of course not, it does no damage to the user or Yahoo. Providing this feature will make users feel more comfortable about their data, and therefor be more likely to continue using Yahoo services.