I dont think so. Safety should be #1 priority. Rather have everything be contained than hit someone in the stands and have a lawsuit on your hands.....
is it me or is that a little overkill?
In light of saving an argument, I don't sell them. These are just trucks on our sled pulling team. But all those sets, there is only about $200 worth of materials in each of them. If you can cut and weld pipe, you can build them. They are not hard to build, just extremely time consuming and about a million trips under the truck fitting them.