Thomas Zloch wrote:
- optional: both comments liked by excited bystanders
...or rather other members of the same "point ring". 
It's twice as annoying when someone makes a comment on some ancient blog that you forgot you're involuntarily "following" (by posting a more meaningful comment earlier) and all it says is "good". WTF, dude? Are you aware there are dozens of people getting an email when you do that?
I can only guess that some people might still not realize that there is 'Like' button (it is a bit removed from the comment area though) that serves the same exact purpose and (sic!) gives points to the author. Maybe someone should write a blog on this. Or a wiki.