"Reasonably implemented measures (Score 1)

I was intrigued by the Court's interest in the "easily implemented measures to prevent unlawful uses." That really sort of makes sense when you think about it. I'm not responsible for everything that happens on my land, but I'm required to take reasonable steps to stop unreasonable harm. I wonder if ISPs will required to take "reasonable steps" to prevent child porn, or spam, or risk liability under the reasoning of this decision? Tj