Grumpy Old Geeks People Rachel Tobac Person Rachel Tobac 2 mentions in 1 episode A social engineer whom a speaker recommends following for her discussion of the Twitter incident. Mentions 460: Pedestrians in the Sky Aug 1, 2020 48:55 If you follow Rachel Toback, she is a champion social engineer. 49:13 She's been following this Twitter thing in particular, very closely.