@heavyphil I don't want to mock them, though — we're all in a difficult place with this cancer, and it's fully understandable that people are looking for ways to feel in control again. The only thing I'll ask is to back off on the diet proselytizing, since there's not much actually established about links between diet and prostate cancer (mainly just isolated studies suggesting statistical correlations), and overselling any tenuous diet:prostate cancer might convince new patients wrongly to start blaming themselves.

I'd suggest that people stick to "I" statements and acknowledging the uncertainty, like "I've decided to stop eating eggs until there's more research to establish whether or not there's a real link." That's totally fair, and no one should jump on anyone for a personal choice like that.