In this study we examined the responses of male and female research participants to information about the endorsement of either old-fashioned or modern sexist views by a sample of either men or women. We predicted that expressions of modern sexism may seem unobjectionable but can have negative consequences. Moreover, they can impair behavioral responses and therefore remain unchallenged. The results show that female participants in particular were relatively disinclined to recognize expressions of modern sexism as prejudicial. Furthermore, while old-fashioned sexist views generally elicited hostility, exposure to modern sexist opinions evoked anxiety in female participants, while it decreased anxiety among male participants. We conclude that modern forms of prejudice may prove perilous: although they may undermine the self, they seem inoffensive and as a result remain unchallenged. (Contains 2 tables and 3 footnotes.)