I think that's the joke. I prefer this non-answer over a long-winded bullshit answer that ultimately means nothing.

I don't mean to be snarky, but I don't think the target audience for these servers trusts them one bit, and the operators know this.

There are people on this page talking about logging into other services from there, so I think you can see one very easy way.

If you use a service that says they don't track anything, delete the machine upon logout, and so forth, who do you think will use that box?

I agree that a target of interest could be located to this service, but to correlate activity of two users would seem to require detailed logs from the provider - the logs they claim not to keep.

Also, by visiting a bank, there’s a chance you could end up being mistaken for a bank robber; or by jogging through a neighborhood, there’s a chance you could be mistaken for a thief; etc. We don’t usually give much thought to these possibilities, although they do sometimes happen. Is there any reason to treat this differently?

Sure, it's perfectly reasonable from a privacy perspective but it raises questions: I don't run around showing my passport to everyone (except for my authoritarian government) and yet I drive around with an id that the authorities can link to my identity.

Don't get me wrong, I'm all for removing layers of surveillance, but I will still assume tor users on my website are either trying to hack it or have something to hide from their government.

I assume they are talking about logging into, say, your email, and thus linking the box to you