You should be able to do the same with anyone's. My understanding. Public messages are not encrypted, but I believe DMs are encrypted meaning you can see events and profiles but not DMs.
Discussion

Not sure what these are but I clicked on the envelope icon..
Here's what I see in DMs using a public key .... Gibberish as I don't have the private key to unencrypt. I can see who they were talking to just not what. I believe this is consistent across clients for this event type.

Outstanding!!!
This clears my doubts 100%
I now understand nostr npub and nsec much better.
Thank you to each of you for helping out!
THANK YOU #[3] !!!!
Nostr rocks!!
#plebchain