Someone online mentioned they feel locking nuts are of the utmost importance on a boat trailer when going after market since it would be easy for a thief to put your trailer on blocks & take the rims while you're out on the lake...I'm not typically a fan of locking nuts as it adds one more thing that could go wrong if a tire blew on a trip. One of my wife's previous vehicles had them & the one time I balanced & rotated the tires, I couldn't find the key & had to pay someone to cut it off. I've never had anything worth stealing in the parking lot before, but I'm not sure I really see that as a problem...for any of you that trailer & have the newer setups with all the fanciness, is this really something I need to do?