Anyone who wants to steal that 100.00 piece of steel is really in need of a life. Not to mention if it is set up right there is a jam bolt on the inside that is torqued to 250 ft/lbs making it almost impossible to just steal. If you are really concerned then drill the hole in the pin out enough to fit a small padlock on it. It won't hurt the pin an may make you feel a little safer.
Good luck
Chris
2008 Dodge Ram 3500 6.7L Cummins Quad cab
B&W 20K turnover ball, Proline custom flatbed
Tekonsha P3
2015 Open Rang Light 311FLR