Okay, so what's the catch? How do you guys and girls post a blank tag when you give someone the props?

Maybe those people were just pressing space enough times to meet the character minimum for a wall post? Or maybe in the past you could give props without needing to attach them to a message? I'm not sure.

Most of the time when I prop someone I just write a message explaining the purpose for the prop, e.g. "A prop for your comments in the Fanpop club".