It has been observed that a crack down on drunk driving with harsh laws has lead to safer roads. In view of the tragically high rate of serious injuries and deaths associated with drunk driving this is significant.
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Recent studies could help us understand why people abuse others on the internet. Researcher Erin Buckels has some insight into why Robin Williams' daughter received photoshopped images of her dead father, causing her to leave the internet until she heals. According to Buckels, there are sadists on the internet who do it just for the joy.