Most mass scrapers, on the other hand, simply grab the raw HTML underneath. ShieldFont exploits this difference through an automated process called OpenType glyph substitution.
That said, because the whole defense rests on scrapers reading code rather than screens, taking a screenshot of a shielded page and running OCR on the image can still recover the real words.
Screen readers used by blind readers also work from the code, so they read the decoys aloud. ShieldFont ships with a beta feature that provides those readers with the real text instead.
I always used to quietly rebel against my boss when I did web development work. I’d spend the time making the pages actually accessible to screen readers and tab navigation and such. Even fixing my coworkers’ code to be compliant.
I always thought it was a fun minigame, and it didn’t even take that long. Little things like, icon buttons also need a text label, tabbing needs to follow a logical layout, shortcuts to jump to different parts of the page, actual tables and description lists.
I used to get in a lot of trouble for “wasting time” because “no blind people are using our software.” Years later an audit happens and my boss is shitting himself. We get a passing grade for accessibility. I never got any recognition for it, but he stopped yelling at me for wasting time after that and just let me do my thing.