Board Thread:Support Requests - Getting Started/@comment-10222962-20140304233629/@comment-5558012-20140305005440

If it's a recent message that you created, I don't see the problem in removing it. If it's an older message and/or there are comments on it, I would say leave it. I personally "archive" my message wall so I prefer if no one deletes messages on my wall except me (with the exception of my first statement). Regardless, there's no rule against removing them from others' walls.