title: Any harm in using global domain validity when obtaining ReCAPTCHA public/private keys?
body: <p>Just curious - is there any risk in using a public/private key obtained from ReCAPTCHA for intended use only on one domain, but then we ending up using it for another one.</p>
  
  <p>I intended to obtain it for a specific domain, but mistakenly took the public/private key as a 'global key':</p>
  
  <pre><code>This is a global key. It will work across all domains.
  </code></pre>
  
  <p>Is it a 'bad thing' to use 'global keys' as opposed to one for a specific domain?</p>