Since our forums do not have a promotion strategy, and in fact since all information is public, the 'like' feature has become redundant. This is why it is not removed from the system.
It is for the same reason that we have not installed a shoutbox modification, which would otherwise allow members to have a platform for direct chatting. This is totally counterproductive and it does harm the principles on which the forums were made. We are still navigating other useful modifications to make the forums more usable.