Comment spammers
It is interesting, it seems that comment spammers cache the pages they spam - or read them from a cache, Googles perhaps? - because it has been a while since I removed the link-field from my comment-form, but would-be spammers still submit it.
I wonder if rot13'ing the input field names would be enough to throw off their harvesters.
So far I do three things that have proven quite effective (in combination): 1) The form goes to a preview-page, this stops a lot of comment-spammers, 2) Check whether the text-field has the same length when submitted first (preview) and second (save) time - apparantly the spammers that figured out to submit the second form aren't that good at interpreting the hidden fields correctly and 3) Don't allow any text that contains [[URL]] and http:// in them.
The last one sucks, obviously. But I think it is better than a CAPTCHA.
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To avoid spam many websites make you fill out a CAPTCHA, or log in via an account at a corporation such as Twitter, Facebook, Google or even Microsoft GitHub.
I have chosen to use a more old school method of spam prevention.
To post a comment here, you need to:
- Configure a newsreaderยน to connect to the server
- Open the newsgroup called
ยน Such as Thunderbird, Pan, slrn, tin or Gnus (part of Emacs).koldfront.dkon port1119using nntps (nntp over TLS).lantern.koldfrontand post a follow up to the article.Or, you can fill in this form: