Welcome to Dream Views! You can use smiles as long as you are not being obnoxious or insulting. This thread looks fine as far as smiles. Some people put the same smile 12 times in a row to insult someone, and that is not good. Here are a couple links that may help.
http://www.dreamviews.com/f11/dreams...eamers-133761/
http://www.dreamviews.com/f79/anchor-key-wild-132755/

Have fun!