Yes, even if it's not a registered trademark, it is trading on someone else's work. Even if it's not in a industry (in terms of legal trademark enforcement), it's unfair to those who worked hard to put it in the mind of the public.
Well, on the other hand, there are loads of products named after pop culture references.
Yes, when I started this I thought it might be fun. The name seemed perfect for such a thing.
It's not trademarked but the app sucks SEO wise (the realisation came later on).