Sticky Comments

This is just a little idea that I had for the group system

What is it?
it's an idea for sticky comments, so that on a group account, if there is a comment of relevance to do with the journal that has been posted e.g. if a journal about group recommendations was posted and someone has a particularly good idea then it can be stuck at the top as a good example, or if an admin of a club is giving information about some club updates and another member wants to add something more to the info but cant edit the journal then they can post a comment if the admin sees fit they can stick it to the top.

How does it work?
if you look in the top right hand corner of all the normal comments there is a blue up button which sticks the comment in the blue "sticky comments" section and comments in that section have a red down button to remove it from sticky comments if it is no longer needed.
i think there would have to be a limit on the number of sticky comments, somewhere around 4-5.

What do you think?
if you like it, say so! if you don't like it, tell me why and how you think it could be better