But why?... How intelligent do you think you come across when spamming on your own wall (let alone asking this question)? Just consider that next time before you spam. That is unless you are fine with being perceived as an immature kid.
Though there isn't currently a rule against it, I'm gonna say save yourself the trouble and don't do it for your own sake. Also my apologies for coming across as some grumpy old man in this comment. That wasn't my intention and I didn't know how to word it ;). Little offense was intended.