There's a lot of things to think about here, as other monks have well-noted. One thing I could add for you to think about: You could also inadvertently block a router that's doing NAT for an entire organization. Everyone behind that router would appear to come from the same IP address in your logs. You may end up deciding that blocking a whole organization is OK, but at least consider what you're dealing with.

One of the more clever ways to stop robots, IMO is to have a tarpit link / picture that triggers a penalty period. Bots are dumb, and they'll fall for it every time, unless a human codes around your particular tarpit.

My favorite example is the tarpit for SQLite on their wiki.


In reply to Re: blocking site scrapers by pboin
in thread blocking site scrapers by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.