ok, then can you explain how there can be a screenshot that states a user at location X said Y then?
As per the screenshot with the caption:
A Whisper user posted this message from the vicinity of
the White House. The red dots indicate Whisper messages
sent from that location. Potentially identifying
information has been redacted by the Guardian.
I think all they're saying is that the location X appears precise, but that it's not accurate. Just because the pin appears at location X doesn't mean that the user was actually at location X, simply that the database ended up recording their location as a (inaccurate) point that happened to be X, as opposed to recording an "area of uncertainty" or similar construct.
That may be true, but the meat of the contention is that Whisper are tracking their users' locations, even when those users asked Whisper not to. The accuracy of the tracking is a bit of a red herring: Whisper is tracking their users' location, without those users' consent.