In October 2018, in the days following the Pittsburgh synagogue shooting, Siskind posted on Facebook that she was organizing an anti-hate vigil in her Westchester County community. After a local newspaper ran a story about it, Proud Boys founder Gavin McInnes and his family, who lived in the nearby community of Larchmont, New York, appeared at the Siskind's door without invitation or forewarning; she called the police.