It seems the #1 issue with people joining nostr resolves around censorship, but not in the way you'd think. A handful of Redditors said they wouldn't join nostr because nostr has or could have hate speech, pedos, etc. and you couldn't ban or moderate those users. 

I get it. 99.999% of humanity doesn't approve of that content and doesn't want to be near that type of content.

I don't know if I have a good enough answer for them though. I told them that with free speech, that means all speech is allowed, which includes the good speech and the bad speech. 

If assholes want to have their corner of nostr and hang out with other assholes, then so be it. The other 99.999% of humanity will hang out everywhere else with positivity and good vibes, zapping each other non-stop.