Smatpuck
Someone who "likes" every Facebook post of everyone's. This especially includes "liking" comments of posts. A smatpuck also "likes" their own comments and posts. If a smatpuck could "like" likes of comment they would.
You're such a smatpuck. You always "like" everything you see on Facebook, and you even "like" your own posts, which you know is an unwritten rule not to do!