Draw text over player's head?

I am working on a set of plugins that will have a commands like

Code:

/dropweapons or /dw
/dropclothes or /dc
/freeze or /f
/unfreeze or /uf

but I need a way to make non-global notification that player really typed that commands and it's not fake. It can be either a chat message in range of distance between me and enemy, or some drawings over his head

Any ideas? Can I try pure Unity engine for this?

 

I think you can use DDraw to draw text

 

I did and it works, but I don't know how to make simple background for the text which makes it heavy o read from bigger distance (but still small)

I am digging now in dissasembled libs searching for luck