Private memo in wallet transactions

Hello, so I searched google and some posts here on Steemit and no one was talking about how to make your memos private when sending users funds. To be honest I just happened to stumble upon it when sending a tip to @lukewearechange I was going to write down #wearechange but I noticed after I put in the "#" the memo changed from publig to private.

So all you need to do if sending a tip to another user and want the memo to be private you add the "#" before your message. I guess only that user will be able to see it then, but I haven't tried it yet.

Anyway with more information about it? I couldn't find any info on it in the latest blog post update or anything.
Hope this post brought some attention to it and that people can use the private memo function it now if they like.