Neat project! URL shorteners are always fun to build and think about scaling. The real challenge is dealing with malicious users. I've spent more time building automated malicious url detection then anything else while building https://t.ly/ Url Shortener.
Currently no, since this was just meant to be a toy project. But I agree with you that I have to deal with moderation if I intend to keep this up. The only countermeasure is to peek into the URL without having to be redirected cause each shortened URL has a stats page. e.g https://emojied.net/stats/%F0%9F%8D%8A%F0%9F%8C%90
Neat.
Emoji domain would have been fun.
[edit: less fun since you can't put emoji's in HN comments (thankfully i suppose)]