For log scale charts aimed at the general public, the key is very clear labeling along the axis. I think most viewers can handle it okay; the bigger problem is that charting tools default to linear scale and most chart makers don’t think about it.<p>It’s in some ways too bad that slide rules have been replaced by electronic calculators. I feel like the general public coming out of high school used to have more fluency with logarithms, which until the last generation or two were <i>the</i> basic tool for all calculation in science and engineering.