I do some experiences with ascii-arts : (^,^) (°_°) (× ×) sometimes it works, sometimes not... Well, I'm just kidding. My browser has some built-in smilies that are "universal", i.e. recognized by most of websites as well as most browsers, and I use them. But as I see, it's not good at all.
You are not responsible for the head you have but you are responsible for the mouth you make.