Some climbing places have auto-belayers so people can climb by themselves. Why don you guys have them?
Safety! Most of those places are amusement centers, portable climbing walls or places that treat climbing as entertainment. Such operations tend to have attendants to make sure that the climber is clipped in properly. Auto-belays do away with the critical safety element of the climber and belayer double checking each other. That said, a few climbing gyms do have auto-belay devices. In many cases they have proven troublesome, since they tend to promote inattentiveness. Inattentiveness has no place in climbing. Have a look at this thread for an interesting perspective.
