Sure, but Yik Yak could have had a "report spam" option, or made users type captchas, or reversed down votes if it saw other people gave attention to the post.

Sure, but Yik Yak could have had a "report spam" option, or made users type captchas, or reversed down votes if it saw other people gave attention to the post. I can think of a million ways that would be better than what they implemented.