It's easy to disable loading of custom fonts in the browser and set default font to what you want. The only thing I'm missing is browser option for minimal strength of small text, because some designers just don't think about people and combine weight:200 with color:#444 or whatever for body text.
I block fonts with uBlock and see this all the time. Usually the icons are pointless and I don't miss them. In bad cases I'll toggle fonts on and reload the page.
