I checked mine a little while ago and had no chafing or any damage. I did wrap each side bundle of wires up with electrical tape to give them some added protection.
Red '05 wagon with aftermarket grill, side front license plate mount and tints behind me on rt 117 in Bolton near Rt 495 heading toward Stow just before 5 pm today. Waved in the rear view mirror.
This morning about 8:40 on Rt 62 in west concord just before Rt 2 came up behind a black legacy sedan and a black GT wagon pulled up behind me. You both headed east on Rt 2.