I think Yik Yak isn’t meant to be an agent of change. I think it’s supposed to be a fun, entertaining medium and a good place to get a simple question answered but I think the reasons you supplied signify that it isn’t something that is necessarily meant to be taken totally seriously. Whether or not that is a good idea is another question entirely, and I don’t have any idea there, except that what they’re doing so far seems to be working well for them.