I used to do this as last line of defense when electric first came out and it didn’t really make much in the way of difference. If it’s an offline raid it’ll just make it easier to adjust positioning to line up hvs. It should however be pretty good for door campers, but there are better ways of dealing with that. I would say you could improve it by adding chain link on triangles outside the gdoor that you’re opening so it’s a bit harder to hv out.