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I'm seeing a disturbing increase in spam posts promoting personal enhancement products such as male enhancement, hair care, dieting, brain enhancement, and other similar products. The following list (all links 10k only) were some of the more recent I have identified:

These kinds of spam are coming up more often than ever and I have been unable to track them down to any common source. WHOIS and reverse DNS lookups of the domains (via VirusTotal) listed in the spam posts have not found any obvious pattern. Is anyone here able to trace these posts to some common source? How do we better defend against this kind of spam? (We might need a Stack Exchange Community Manager here.)

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    This is a long-standing network-wide issue. Sit tight and have something to bite. – John Dvorak Jul 3 '15 at 6:02
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    These aren't bots or infected computers. In most of these posts, a human registers on the site prior to posting. – fixer1234 Jul 4 '15 at 3:47
  • @fixer1234 The fact that a human created the account or completed the captcha doesn't necessarily mean the machine isn't a bot... – Parthian Shot Jul 6 '15 at 16:18
  • Might be worthwhile to expand the list of keywords that automatically flag questions for moderator attention during the hours spam tends to persist longest (i.e. when people are asleep on the east coast). – Parthian Shot Jul 6 '15 at 16:20
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    Just keep flagging as spam. Eventually SE's anti-spam systems will learn and start blocking these posts: meta.stackoverflow.com/a/286615/1157054 – Ajedi32 Jul 7 '15 at 16:07
  • Human Verification could be the answer, but is annoying and some bot systems are enough smart to jump that verifications. – Francisco Tapia Jul 10 '15 at 17:35
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    This isn't really a problem that is specific to SU, and you can bet that people at SE are looking into options of what can be done to stop spam. SE already blocks a very substantial amount of spam at source and what you see is largely just the tiny amount that manages to slip through. The best you can do is to help out by continuously flagging spam for the system to learn from. It's not just you the spam annoys, but we need to remain open to the majority so that everyone is able to get help when they need it, some spam is the price we pay. Just sit back and get you some processed meat product. – Mokubai Jul 13 '15 at 14:49
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    @FranciscoTapia yeah, I hate Captcha, but then Google's new one looks much cleaner. – Ian Jul 15 '15 at 11:31

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