I agree with Mike, in fact I was suprised that the CJA allows hitches to be used as a recovery point. I have seen 3 hitches broken as a result of recovery. They do work fine in most situations though where just a gentle tug or two does the trick, and I would feel a lot safer winching to one than tugging with a truck. For me it's more a clearance and comfort issue though, ever since that one time coming down from top o' the world when my hitch hit a rock coming off a ledge. It was jarring and painful, especially to my back seat passenger.
If you gotta tug on a trailer hitch it's much safer to use a tow strap in a v shape that is attached to both outside edges than to tug on the unsupported middle where the safety chains are supposed to be attached.