Not for me.
All I see is:
Challenge V
The guardians at Giza Base have no way of identifying you. As such, your presence is considered an intrusion. You're hereby strongly advised to make yourself visible before it's too late.
Apart from fiddling with the HTML, the HTTP request and my settings on this site, what am I supposed to do?
I've been working on this challenge for over an hour now. The other threads have people who've got rid of the message by doing nothing in particular, apparently.