Roast Busters - What Does it mean?

So, as it turns out, a group of young Auckland men referring to themselves as Roast Busters have been engaging in behavior than many lay people would describe as rape. This is then followed up with public naming of their victims on facebook. While Police say it's not a crime yet, with the 3 news interview suggesting that crimes haven't happened unless they have been reported, they do admit that the behaviour is immoral.

Links to articles can be found here:

http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11151135
http://www.3news.co.nz/Facebook-teen-sex-shaming-exposed/tabid/309/articleID/319919/Default.aspx#.UnbAQ_lmiSo
http://www.3news.co.nz/Roast-Busters-part-of-a-growing-trend---NetSafe/tabid/309/articleID/319966/Default.aspx#.UnbAQflmiSo

If anyone knows what the name Roast Busters means please feel free to share this information in the comments below.

Urban Dictionary (through looking for definitions of Roasting and Busting) would seem to suggest that the name refers to participation in group and/or sequential sex to the point of ejaculation.

http://www.urbandictionary.com/define.php?term=roasting definitions 2 and 3
http://www.urbandictionary.com/define.php?term=busting defintion 2

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http://testingtestingnz.blogspot.co.nz/2013/11/roast-busters-willie-jt-and-amy.html