Visited a sex advice (no porn, no nudity, no profanity) site of mine at about 2am GMT today and noticed that all pages were showing PSA ads. Visited the same site at 8am GMT today and all pages now showing normal ads. I decided to remove Adsense ads from the site when I saw the PSA ads but am not so sure about this now. Could this be a geographical\demographical\time zone thing? Maybe others can learn from this - before you remove Adsense from your site or modify the content because of those PSA ads. check your sites at various times.