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> Ranking posts/comments by the exponential of inverse IPAddress-post-frequency

Doesn't this just incentivize posting a bunch of comments from your residential proxy IP addresses to launder them? This smells like a poor strategy that's likely to lead to more spam than not. Also, everyone has to start somewhere so your legit IP addresses are also going to seem spammy at first.

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Hmm consider an established social network which sees lots of bad actor activity, these folks will likely be sharing IP's on these residential network severly damaging their reputation.

You should only see one user-id per MAC / IP. If you see multiple then its a sign of a bad actor.

Before you're established using something like a captcha prevents most spam, except for state actors, and they wont be focused on the site until its larger.

I think residential proxy IP's still have the same associated cost, and arent those often for bundled traffic?

I'm not much of a blackhat so excuse my lack of knowledge on tricks of the trade

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