If you wanted to bring the symbols into the drawing based on the dimscale, how could this BE ACCOMPLISHED?
It may be worth pointing out that this is very easy to accomplish with Tool Palettes.
There are a number of ways to use them. If you have an existing library of blocks created with 1 drawing for each block, the easiest way is to use Design Center to browse to the directory containing the blocks, then right-click on the directory and select "Create Tool Palette of Blocks".
If you have one drawing with a lot of blocks in it, browse to that drawing in Design Center, right-click on the drawing and select "Create Tool Palette".
Once you have created a tool palette, you can change the properties of multiple tools simultaneously by holding down the SHIFT button and selecting the tools you want. Or you can click in a blank area of the tool palette and hit CTRL-A to select all of them. Then right-click and select Properties, and change the Auxiliary Scale to "Dimscale". This will cause the blocks to be scaled by the current DIMSCALE as they are inserted.