I find the case disturbing.
To prove rape, the prosecution must show that the bloke had sex with the woman without her consent.
Possible scenarios (getting behind the man's eyes):
(1) Woman is unconscious and man has sex with her - clearly rape
(2) Woman is obvously drunk and says no - again rape because there is no consent
(3) Woman is obviously drunk but not unconscious, man has sex with her and she does not say yes or no. - This is not sex without her consent ie not rape - unless you argue that being drunk negates consent. If so, what degree of drunkenness negates consent? Does the man have to breathalyse her?
(4) Woman is obviously drunk and indicates consent eg comes on to the man. Man has sex with her - whether or not the woman remembers giving consent, this is not rape, unless we go back to the argument that being drunk negates any form of consent. The law does not support his argument. This sort of situation happens all the time.
If the woman stands up in court and says she cannot remember whether or not she consented, the prosecution case falls flat because they cannot prove beyond a reasonably doubt that the case falls within (1) or (2).
Moral of the story to women: don't put yourself in vulnerable situations by getting paralytic. To men: you are taking a big risk by having sex with someone who is clearly under the influence.
The security guard acted in a way which is stupid at best, morally reprehensible most likely, and possibly criminally. But we will never know the true story because it is one person's word against another.
Sorry this has become a long post. Was thinking aloud.