John
Rack’em Up!
Similarly, I use L shaped plastic extrusion glued in reverse at the back to keep the albums all lined up.
I thought about doing something but in the end found it mostly a non issue for me as I'm just a bit more careful placing records back in place. I prefer to keep the spines lined up with the front edge so that they can be well lit and easy to read. Adding a stop along the bottom is a good idea but I was concerned about denting the lower portion of the album cover.
My other three record racks all have backs to them and put the spine right toward the front edge.