Yet. They know it would be suicide to implement anything like that while it's so fresh in people's minds. Just because they haven't doesn't mean that they won't

Yet. They know it would be suicide to implement anything like that while it's so fresh in people's minds. Just because they haven't doesn't mean that they won't. It was famously said (although by whom is debated) that 'Eternal vigilance is the price of liberty.' To prevent the feared negative consequences we need to keep the public engaged and educated on the topic.