Wired ran an interesting article today, looking at 2 Google Maps that tin present your geotagged Tweets.
GeoSocial Footprint reminds me a lilliputian of Please Rob Me (which no longer seems to work) inward that it takes a real dim persuasion of people sharing their place on Twitter. Even if you lot disagree alongside the supposition that sharing your place on Twitter necessarily puts you lot at 'high risk' it is worth entering your Twitter cite into GeoSocial Footprint to persuasion a real prissy heatmap of your travels.
Ready or Not, from the University of California, too seems to warn against sharing your place alongside Twitter. Again if you lot come inward a Twitter (or Instagram) user cite you lot tin persuasion a real prissy heatmap of geotagged Tweets.
Ready or Not too includes a prissy calendar characteristic which allows you lot to meet where you lot were (or whatever other Twitter user was) at a detail engagement in addition to time.
References:
For the screenshots inward this post service I used the describe of piece of occupation organisation human relationship of journalist Benji Lanyado. The heatmaps present Benji's journeying for The Guardian's Twitter route trip from Chicago to Memphis.