Quote by FirstBlush
Hello and welcome!

Think of a wall post as a 'Lush handshake'. When someone sends you an invite and you accept, it's customary for them to send a 'welcome' post.

You're not obligated to return the favor, but often it's considered common courtesy to do so.

There is also a 'delete' option with each post. If one isn't to your liking, you can remove it.

Hope that helps. Happy Lush-ing!