The real danger here is that citing webpages creates significant risk that the content will be altered in future.

For example, to re-write a portion of history:

1. Scan wikipedia for any broken links

2. Purchase domains

3. Reinstate links with different content

4. Update wikipedia article to represent changed content

We need a method of publicly verifying the contents of a link at the time it was cited.

Could we do something similar to bitcoin? Where we have a publicly available hash of each site when cited?