Emoticons in posts
Some of you will be upset that smilies or emoticons as they are known, are not available from a drop-in list within the post editor. This feature is coming but not available until early next year.
The forum uses native WordPress emoticons. You can insert emoticon code in a post content and it’ll be replaced to yellow emoji on post, as you can see I've done above.
A reasonable compromise until it can be added to the post editor