Removing “We didn’t know better” as a plausible excuse is sometimes sufficient to stop abuse. Nothing prevents Cogent from circumventing, but if they do so, that will likely be interpreted as willful violation if they are taken to court by ARIN, who is prepared to do so.
How does this square with the recent court ruling that linkedin scraping is legal? After all, it's all public data, and I have no doubt that linkedin tried to IP block the scrapers.
