Think of all the aspects.. Where would the button go? Would it be be below, above, to the right? Beside the name? What happens when someone likes/dislikes something, and then changes their mind and changes their vote? Is the previous vote permanent or does it automatically change. What would they look like? Will people be able to tell how may likes/dislikes there are? Will people be able to tell who liked/disliked it? How many dislikes will it take to flag something? Will you have likes as a way of putting things in best of/stickied? Will the devs be able to do this? Will the devs be willing to do this? Should their be a flag button? Will people be notified in their newsfeed about their comments getting liked/disliked? These buttons are an okay way of expressing feelings. However, how will people abuse the flagging.(Locking threads is a mods job, if you're popular enough...you have enough power to be a mod. That's not necessarily a good thing. What are other ways?) MANY things to think about when introducting new ideas.