Would adding the Thumbs Up Post Icon from the Standard Editor (not sure if it's available otherwise) be an option? This would provide a visual to users and not muck up searches.....
I know the icons are not used all that much but just looking at them, I can think of a few uses:
Thumbs Down - Reply to the OP's question didn't work
Thumbs Up - Solved
Light Bulb - Providing an Idea
Question - Posted Question
Exclamation - Volitile
Smiley - Entertaining
etc....