If you require including the fonts outside the base set you are going to end up tossing a lot of fonts around that aren't really needed. What I'm after is use this if you can, if you can't use that.
As for scaling--it doesn't work when the zoom is too great. It really doesn't work too well if you have some sort of texture to your image and you squash it too much.
Consider a real world case: maps. I'm looking at a topographic map of an area around here, the farther back I pull the camera the more features get omitted because painting them would end up obscuring more useful information. You could use lines with a wider spacing but that isn't even too useful as the camera pulls back.
As for scaling--it doesn't work when the zoom is too great. It really doesn't work too well if you have some sort of texture to your image and you squash it too much.
Consider a real world case: maps. I'm looking at a topographic map of an area around here, the farther back I pull the camera the more features get omitted because painting them would end up obscuring more useful information. You could use lines with a wider spacing but that isn't even too useful as the camera pulls back.