Corporate annual reports and the Wikipedia are two great resources to find really bad charts. We can’t do much about corporate reports, but we can actually change the Wikipedia articles. So, here is an assignment for you: find a bad chart and replace it with one that actually makes sense from a data visualization point of view. Do it once a month.
Here are a few examples to inspire you. If you like data visualization and don’t feel embarrassed by these charts, I don’t know what will motivate you.