What is not great in the eyes of some is the potential and actual abuse from the system that will result.
Take for instance what happened when I created simple macro that did /lol, and spammed it for 60 seconds. I got a nice number of 258 "Total times LOL'd" written down in my achievements page, right there for everyone to see. This just opens up the door for abuse of the worst kind – lol abuse.
What do I mean by lol abuse?