I've used rebar when starting out also after reading an article on shooting steel and splash back or splatter I can see the concern for some ranges that use wide berms and more than one stage on a berm because believe it or not splatter can be focused since it is going off at an angle to what ever the lead hits. It's a predictable angle something in the neighborhood of 35 degrees from the surface that's why if you look at the plates that are angled down you'll normally see a trough of lead in front of it parallel to the soggy line or it heads off to the side berm that's why sass recommends the targets placed parallel to the line not facing the shooter if they are not in line with the target the lead will bounce off at a shallower angle this way still hitting the side berm. I've only shot one place that I recall that didn't use berms of any kind. That range was on a private ranch and was part of a section of land owned by the landowner and on match days the livestock was moved to a clear area along with the workers from what I saw.