wurfl.io é seguro?

From the parent site at http://responsivedesign.is/resources/device-detection/wurfl.io : WURFL (Wireless Universal Resource FiLe) is a community effort focused on mobile device detection. WUFL is a continually growing list of all the recognized devices in the world and provides us with valuable insights in to what our clients are using to view our sites. It can be used - and I think it its in this case - to determine which images to return to the client. Smaller images (both in pixel size and data size) can be sent to phones, while slightly larger ones go to tablets, and the full-size ones to desktops. In order to do that sort of thing they have to keep track of devices by their type to know what "bin" they fall into.