A guardrail block includes an attachable support for signage, such as a reflector. The system comprises one or more input devices arranged to receive an input, the input corresponding to a desired of affected change in taste. In at least some embodiments, content manipulation is \u201cdirect\u201d in that content displayed in a user interface can be moved in andor out of the user interface in a direction that corresponds to user-initiated physical movements, such as the user dragging or flicking the content with the user’s finger or some other type of input device.