You can set the LTSCALE for each entity through the properties pallete too.
Right... That's the problem we're facing right now. We're changing a couple thousand drawings and they want 'our stuff' to look 'right', so they've decided that the LTSCALE needs to be CHANGED to 1 in every drawing we touch. The clients' drawings have a number of different LTSCALES set. I don't really agree with that because in doing so, we change some of the existing objects in the drawing, "but hey! Our stuff looks great, don't it?!"
Really, there is no perfect (quick) solution, so I'm just going to pretend that I don't care and go ahead with their plans.