I don't disagree with the value of solving serious problems, but this sort of behavior should not in any way be discouraged. I think I would dislike working in that kind of environment!
You're on the wrong site if you think utility is a factor in choosing a project to work on. The hacker mindset is that a project is worth doing just because it's possible to do it, not necessarily because there's any good reason.
Even if it just brings people a few laughs, I'd say that this product has meaning, and that I am proud of it.
Let's face it, most of the work we do is an effort to improve and/or increase your leisure time.
Think about it.
"I am very excited about this project as an example of the kind of creative approaches leveraging modern web infrastructure to tap into a newly emerged social behavior."
Please tell me you are joking... This is a fun useless app. Don't use weasel words to make it look like something it isn't.