The Reason People Are Outraged over This
People are obviously upset because they weren't invited to that party.
Seriously, the only reason why anyone outside of Ireland finds this newsworthy is that the Irish are making a fuss about it. It was obviously a night with friends, not an official event, she doesn't look drunk and she's simply having fun with her (girl)friends and making a pose for a party photo.
Get real, people! Ninety percent of the time, when a politician breaks the law "just a little bit", the public and their party let it slide, but things like this cause an outrage. Must things be so hypocritical?
What would be the message if her party took any action against her? "If you're not bored 24/7, you're not one of us!"?!
P.S. Nice of The Register to supply a photo with the story. :D