What is spam? 

It may be difficult to approach a consensus on the definition of spam... However, hammer the obvious spam ruthlessly while keeping in mind that a course/code correction may be necessary later to ensure nostr is "a public square".... Think of it as a physical people: thinking, speaking and conversing ... The natural physical limits of human communication/interaction can surely be somehow defined and applied as some type of publicly-known standardized nostr spam filter? If breached, you npub is basically nuked and you have to start over??

Probably would be difficult to make the parameters simple but could make the spec quite wide to cut out the worst offenders...

Thank you devs!