What is the cost of serving them a plain jane experience, as you do with a printer or feed reader? If you can model your audience and quantify the impact (in other words, prove your theory) for your audience, why BLOCK THEM? Just give them the content, minus the design. Spend the same amount of time you spend on your print.css file.

Anything more restrictive than that is not about income, as you suggest - it's about dogma.