The use of social media platforms (such as Facebook) for research recruitment has continued to increase, especially during the global COVID-19 pandemic. Social media enables researchers to reach diverse communities that often do not have their voices heard in research. Social media research recruitment, however, can pose risks to both potential participants and the researchers. This topic paper presents ethical considerations related to social media recruitment, and offers an example of harassment and hate speech risks when social media is used for research recruitment. We explore the implications of hate speech risks for ethical research.