Blair Briscoe said she thought she had found a perfect holiday activity for her kids when she took them to a family-friendly Christmas drag show in Grand Prairie last December. Despite having to navigate past the protesters clashing outside, there wasn’t much trouble inside Texas Trust CU Theatre, and her two kids seemed to enjoy the show. But the next day, a conservative activist and TV host with more than 300,000 followers on Twitter posted a video of Briscoe and her kids that the activist covertly recorded in the theater lobby. In the video, Sara Gonzales approaches Briscoe and asks...