I do it sometimes, but I assume most people don't care that much. I usually give using the trade for points system, I figure over a long enough period of time I'll build up a good amount.
I give one back to every member who gave me a llama and I also give them to people who add me to their or faved my artworks. It's just a nice way to say "thank you" since some members actually collect them.
As i noticed in my jornal twice that I'll give llamas for favs , and true I've been giving llamas to people who fav my art and they were like "thanks for the llama "
Devious Comments
Mainly because I have no idea what the llama badge thing is all about. I must have missed a news article or something...
If somone asks for one I'll give them one
Also I'll give one if some1 ask for it *evil smile*.