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Ask HN: Is Hacker News under attack from spam bots?

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Re: Ask HN: Is Hacker News under attack from spam bots?

#23

At the end of each spam message there is a unique 15 character string. Anyone know what purpose the string is supposed to serve?

Poor attempt at trying to make the URL unique possibly and prevent it from being blocked. Someone could easily block the domain or use regex to block comments with that domain.
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