Exactly. That might merely seem embarrassing, and one could say 'use incognito browsing' for obviously personal stuff. But what if you're interested in politics and your employer strongly supports a different party? Or you have health worries of your own or for your kids, and an employer doesn't want to see health premiums rise? Such concerns seem abstract until they begin affecting people's livelihoods, by which time it can be hard to undo the ill effects.