[jasomill]

The only potentially troubling thing I could find in the VS 2013 EULA relating to privacy is that

Microsoft automatically collects information identifying your installed Microsoft product, the operating system of the device, the CPU architecture of the operating system and data regarding the success or failure of the installation of the software, data identifying the cause of a crash in the product and information about the product license which is in use.

. . . .

Microsoft may use the computer and services information to improve its software and services. Microsoft may also share it with others, such as hardware and software vendors. They may use the information to improve how their products run with Microsoft software.

In principle, this could be interpreted quite broadly ("selling detailed information about our installed base to third-party marketing software firms helps us pay for improvements to our software").