Could BIP-353 potentially have problems similar to the recent fedimint DNS thing? Forgive me for a potentially stupid question. 

 Yes, it's subject to your control of a given DNS zone like any other website 

That's rarely an issue though, and it's not meant for critical operations

Fedimint did something uniquely stupid in their design, and not just promoting ECash  

 Relay hints too 

nostr:nevent1qqsf7cvr4tj8r4d70tana3mv2xkvgrkz9wgspnw9hsrlqkmuu6n73vgpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsygpnzm3kjm08f5uetyf8h8vy9h6hhhw968r6lzsy7x784mvqk3zs3qpsgqqqqqqsgg3jrq 

 👀