I'd ABSOLUTELY say no edits. 

I think it's part of the ethos of Nostr--and a reminder that Nostr is different--it's about privacy, and freedom of speech. No edits are a part of that--

Just like in real life--once you say something, you don't get to pull it back. Yes, you can apologize but your words are forever.

So it is with Nostr.

Think before you speak--both IRL and on Nostr. 

 No edits is the literal OPPOSITE of privacy and freedom of speech, what are you talking about?  

 Think about it--when you talk to someone you can never "take back" the words you've said....

Same with email...once you've sent it, you can't really pull it back...

If you want to edit your message, do it before you hit send... 

 Your argument is also well accepted. I always usually read before multiplying something! Sometimes, it goes unnoticed wrong writings or missing a letter - since I use the cell phone as a transmitter; this gives me a lot of anguish.