You have to turn the function on to use it, so there's no risk of accidentally including your location if you don't want to. If you do enable the function, the line beneath your tweet on Twitter.com reads "x minutes ago via web from [x location]." The location text then links to a pop-out Google map detailing your general location. This could be useful for tracking breaking news, or if you're at a conference or other event where you're traveling between cities or even neighborhoods. . .but it's just more information that could potentially be an overshare — or even a security risk.Twitter is the latest service to launch this location-based function, on the heels of Facebook's announced plan to do the same. Can we officially say that location-based features have jumped the shark, or is it just the next big thing?