I'm completely with you. Editing tweets would be a disaster. The only way I could see it working is if you opt in to say a 5 minute grace period where you can

I'm completely with you. Editing tweets would be a disaster. The only way I could see it working is if you opt in to say a 5 minute grace period where you can edit. But then your tweets won't actually show up on anyone else's feed for 5 minutes.