Probably as good a way to build opaque walls as any.I really liked those stages and would like to do similar.
Here's a little insight to that though.
Hanging the tarps on the cables was stretching the cables and causing problems, so there would have to be an alternative, That is why we built the walls was to prevent damage to the trolley system.
Its not to say that tarps could not be draped over the walls for similar effect..
Kinda surprised y'all went mesh walls in the first place, since there's no wind inside.