<p>"For one Australian girl, turning 16 was not so sweet.</p>
<p>After sending out birthday party invitations to schoolmates via Facebook, the event went viral and close to 200,000 people received and accepted the invite.</p>
<p>The Facebook event included her address and told her schoolmates they could bring friends if they asked her first, Sydney’s Daily Telegraph newspaper reported.</p>
<p>‘(It’s an) open house party as long as it doesn’t get out of hand,’ she wrote on the event page.</p>
<p>The party quickly escalated after more than 200,000 people replied that they were attending the birthday within 24 hours of the event posting. </p>
<p>According the Telegraph, police have charged a 17-year-old schoolboy who allegedly hijacked the page and reposted the event. A number of postings on the invitation suggest the event was hijacked by members of the hacker group, Anonymous.</p>
<p>The party was canceled and the Facebook page was taken down."</p>
<p>[Entire article from Daily Telegraph.]</p>
<p>Have any of you ever had (or heard of) one of these “flash mobs” show(ing) up at a party advertised on Facebook?</p>