Tamper-resistant devices and systems for wall-mounted dispensers

An accessory device for a dispenser configured to mount to a generally vertical surface, the dispenser having a back housing including a back plate rear wall wherein the back plate rear wall is parallel to and juxtaposed with the generally vertical surface when the dispenser is mounted to the generally vertical surface, the dispenser further having a cover pivotally coupled to a bottom of the back housing such that the cover automatically rotates outward and downward from the generally vertical surface to an open position when the dispenser is mounted to the generally vertical surface, wherein the cover in a closed position has a perimeter edge proximate to the generally vertical surface, the perimeter edge including a cover top edge interposed between and continuous with a cover left side edge and a cover right side edge, the back plate rear wall further comprising a back plate rear wall extension extending past the cover top edge, a portion of the cover left side edge and a portion of the cover right side edge when the cover is in the closed position, the back plate rear wall extension having a top extension edge, a left extension edge, and a right extension edge, the accessory device comprising:

• a plate having a front surface and a rear surface, wherein a thickness of the plate is a distance between the front surface and the rear surface, the accessory device configured to couple to the back plate rear wall extension such that the rear surface is juxtaposed with a front surface of the back plate rear wall extension;
• and
• a lip extending rearward from a portion of a perimeter of the plate, the lip providing an additional thickness equal to a thickness of the back plate rear wall extension,
• wherein the accessory device is configured such that when the accessory device is coupled to the back plate rear wall extension the lip covers the top extension edge, the left extension edge, and the right extension edge, the plate further having an underside surface generally normal to the front surface and rear surface, the plate further having an outer surface generally normal to the front surface and the rear surface and excluding the underside surface, wherein the underside surface is shaped to generally match the cover top edge, a portion of the cover left side edge proximate to the cover top edge, and a portion of the cover right side edge proximate to the cover top edge,
• wherein when the accessory device is coupled to the back plate rear wall extension and the dispenser is mounted to the generally vertical surface and in the closed position, a first gap exists between the underside surface and the cover top edge, a second gap exists between the underside surface and the cover left side edge, a third gap exists between the underside surface and the cover right side edge, wherein each gap is configured such that the dispenser is able to be opened and closed when the dispenser is mounted to the generally vertical surface, whereby when the accessory device is coupled to the dispenser and the dispenser is mounted to the generally vertical surface lodging of ligation material between the accessory device and the dispenser is prevented.