![Cool 8)](./images/smilies/icon_cool.gif)
They have their counterparts in optional columns so there is no need to making them unremovable.
![Smile :)](./images/smilies/icon_smile.gif)
Furthermore they are somehow faulty in comparison to optional counterparts.
![Exclamation :!:](./images/smilies/icon_exclaim.gif)
So they are not necessary, they are faulty and it is not sure anyone would ever need them all the time.