I’m less concerned with bias in targeted ads than bias in targeted news. If your average redneck engages more with stories that portray immigrants in a negative light, does the algorithm feed him more negative stories, memes, and disparaging comments of immigrants while avoiding anything that might portray immigrants in a positive light. We know it happens, but the lack of public data , research and transparency at a time when social media is being called out for amplifying social division shows a need to better understand the algorithms being used by social media to do demographic and individual targeting