[tor-relays] Actual user demographics?

[Anders Andersson]

On Wed, May 3, 2017 at 7:27 PM, tor <tor at anondroid.com> wrote:
>> What can be known is *how* TOR is being used by setting up studies at
>> exits and seeing what kind of services people are connecting to.
>
> Please don't do that, or suggest doing that. Sniffing or inspecting exit
> traffic may be illegal in some jurisdictions, and will result in the BadExit
> flag.

How is this even possible? Surely, sniffing or inspecting traffic is
inherently passive?