[RightField]

Wow, even Wayback Machine has it blocked.
James Hodgkinson

So, what is a 'robot.txt?'
Another way to control history?
What dangerous times we live in.

[Jagermonster]

robot.txt is a file at your website that tells automated web browsing systems called robots (like the ones at Wayback) whether they may or may not access the site.

Facebook seems to generally exclude robots from accessing their site, preventing the wayback machine from archiving facebook pages. Your own facebook profile would similarly not be available on the Wayback machine.