Yes I have and it destroyed the rearend!!! Also noticed the axle splines taking a beating!! If you do,don't do it EVERYDAY and make sure you take real wide turns to give the spool some room so it doesn't load up the axles very much!!! I had it in an 8 inch,so a 9 inch may hold up better!! It cracked the end caps on the carrier from soo much of a stress on a turn!!
I've run a spool on the street and it sucks. My car is mostly a drag car, but I enjoy some limited street use. If you drive primarily on the street, don't get the spool. You will hate it. A Detroit locker is much better. It works well on the street and the trac, but they aren't cheap. Spools are cheap, but you may end up replaceing parts in the rear after you break them. So, you decide what you are willing to put up with.
I have been running a mini-spool in my 68 with a 9" for 2 years now with no problems. I drive it at least 3 times a week to work which is 40 miles away. I have yet to have any problems. It is not always fun in a tight parking lot. But just goose the throttle and it will come around.