You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Fact-checking shouldn't be a democratic process. But you could have PageRank for trustworthiness. Bootstrap from 3rd party orgs like Snopes, then start assigning secret topic-specific trust scores to users who vote for facts based on how consistent they are with the seed orgs.
On new facts, reliability is determined by looking at user votes weighted by their trustworthiness on the topic (votes from unreliable users get dropped). Grow from there. The system wouldn't drift much, because truth is self-consistent -- BS is not.
PS: subjective value judgments are not facts (is chocolate delicious?). Facts are part of an objective reality that rational, informed humans of good faith can agree on.
What about users deemed expert or knowledgeable in that area getting extra weight for their votes? Somewhere between a seed-org and a user, especially for known experts.
How do you account for bias and spin (experts and non experts alike)
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
