Lyric discussion by SiliRat 

Cover art for Backpackers lyrics by Childish Gambino

No, the line references 'rape culture'. A number of bloggers had commented that some of his lyrics (which jokingly reference rape) contribute to a general acceptance of rape within western culture. He is commenting on those criticisms.

Here is an example:

http://chocolatewastedberries.tumblr.com/post/6114155042/rape-is-hilarious-donald-glover-edition

Rape Culture (Wikipedia):

http://en.wikipedia.org/wiki/Rape_culture

Oh, tumblr. Of course.