Similar to how you can swap the IP addresses of two Linodes, can one swap IPs between Nodebalancers and Linodes?
Based on previous threads, no. Two different infrastructures.
You can mention users to notify them: @username
You can use Markdown to format your question. For more examples see the Markdown Cheatsheet.
> I’m a blockquote.
I’m a blockquote.
[I'm a link] (https://www.google.com)
I'm a link
**I am bold** I am bold
*I am italicized* I am italicized