Dont think I've ever scraped mine on anything, but it could be that the little extra height from the 225/45 tires and stock suspension give me more clearance. I haven't even scraped the from lip splitter either.
I keep wanting to buy a rear splitter, cut a piece out and maybe weld that piece to a square tube that will fit the hitch and use it to hide it when not in use. :P However spending 600$ on a maybe project is probably not a good idea.