There have been at least 50 school shootings in the United States so far this year, as of September 19. Thirteen were on college campuses, and 37 were on K-12 school grounds. The incidents left 24 people dead and at least 66 other victims injured, according to CNN’s analysis of events reported by the Gun Violence Archive, Education Week and Everytown for Gun Safety.
https://www.cnn.com/us/school-shootings-fast-facts-dg/index.html
Gun stores are the final decider on who is and isn’t buying guns. There should be more training for them, but also more liability attached as well. They know the people who are making straw purchases and they ignore it because they want sales.
I know quite a few local FFLs and not a single one of them would risk their license and livelihood by knowingly selling to straw purchasers.