We shouldn't fear retribution based on our opinions, but Nostr requires us to take responsibility for what we say, and we should expect to be held accountable for it. There is no way to delete or edit on Nostr, and I honestly hope that functionality doesn't come along in spite of the amount of noise calling for it. Put ideas out there, put opinions out there and let them be challenged. The trick is using the challenges to learn more, question our assumptions and conclusions, and then proceed to new conclusions and opinions based on our new found knowledge. That's what having a solid foundation under our information infrastructure will provide.