Wow, I've never encountered this before.
I liked a magicians page on Facebook, and a few days later he posted on his newsfeed a very warm welcome to the new likers of his page.
He went on and gave an individual brief of who we are and what we do - me being a house painter and fellow magician. He mentioned his performances he did in my area as well.
"Lets give him an ornate welcome" he finished with.
This is a very personalised welcome and this will stay on my mind forever. What a great idea for a lasting impression.