User blog comment:Number1bleachfan/New Emotes/@comment-1393830-20110910160348

The emoticons are a massive server strain. As an admin on Central, I got to play around with them as they were being put into place. They have many complications, can ruin linking and if they are not exactly 19x19 pixels, they will slow down chat and induce massive lag. This Wiki has access to the default emoticons (unfortunately) but it would not be a good idea for us to implement our own emoticons at this point.