“Lessons in Adsense Sensitivity”, or, “How Not to Get the Dreaded PSAs (Public Service Announcements).” As a webmaster, I learned some good lessons recently about Adsense’s over-sensitivity to certain words. Immediately upon publishing a page about mesothelioma, a specific type of cancer, the Adsense ads were replaced with PSAs. No matter what I did, it seemed that I was getting the PSAs.