>>2844776
Two main things are that the conditions have to be just right for an individual to be able to multiply their damage like that and that most people simply aren't very creative. After the movie 'The Burning Bed' was broadcast, dozens of women tried to kill their husbands by setting their bed on fire while he slept. They could have done that before watching the movie but their brains never were able to put those thoughts together. Lots of copycat crimes happen that way. Next time the conditions are right for this type of fire, don't be surprised if someone tries to make it happen again now that they know it's possible (even though it's long been possible).