For insight into how the forthcoming taxi-share changes might actually play out, look no further than Yorkville, where Manhattan's only officially-sanctioned taxi stand whisks perfect strangers to Wall Street every morning, for $6 a pop. Some women have voiced concerns about predatory cab Casanovas using the shared backseat to get fresh, but they might be reassured by the customs that have evolved out of two decades of Yorkville cab share culture. As rider Glenn Caldwell tells the Times, "Everybody seems to know the rules." Namely: No talking. Not to each other, not on a cell phone, not to yourself. Of course, the militant silence could also be attributed to uptight Upper East Side WASP reticence, so we'll have to see how this goes once gabby shoppers start piling into cabs by Herald Square. But TLC commissioner Matthew Daus promises that shared taxis participating in the pilot program will have "a code of conduct" posted inside, discouraging New Yorkers who might, in a moment of weakness, be inclined to let their guards down and actually meet someone new. (After all, that's what the Internet is for.)