Yes can't delete the Nostr event of course but there needs to be a way to delete the hosted media file. 

Receiving payment for media that is not yours is probably going to be problematic eventually when it gets noticed.

There's a couple full concerts that I posted where I put a link to the artist's merch site in the description. That seems fair to me.  

 Yeah I thought, yeah you can't delete event, but you could take it off of flare(?)

Maybe this is solvable with using relays that accept deletions, like that 'nos' client feature? 🤔