| ||Ask HN: how would you protect a URL redirection service from spam?|
10 points by benhoyt on Mar 4, 2009 | hide | past | favorite | 9 comments |
|I run DecentURL.com, and many people have found it pretty useful to date, but the problem is that now most of the URLs submitted are spam. Legitimate users don't see this, which is great, but as sysadmin I don't like the fact that 95% of the links in my growing database are spam (or that spammers are then using DecentURL as a kind of spam proxy).|
Mostly it's some site like nycshorttermrental.com submitting say 200 times with a different random title each time, over the course of a day or two.
Something like Akismet doesn't work, because there's not enough data. All you give DecentURL is one URL, and Akismet can't tell it's spam from a bare URL (you can try it at http://www.voidspace.org.uk/cgi-bin/akismet/test_akismet.py).
Any suggestions? How do other URL redirection services kill spam? (Or do they just ignore the problem, and let the spam come in?)
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