Me too was thinking about that long time ago. lol But today only I actually posted it as a suggestion.
First I was thinking about 'Good' and 'Bad' buttons on the user profiles so other users can rate the users. But later I think it would cause harm and the getDare staff would not like that idea. What do you think?
Then I thought about having a mechanism to put likes on posts. It would not create problems right?
I do not think it's 'copying' from Facebook. Zuckerburg didn't invent that idea. lol. It's an idea almost all the popular sites are using. See YouTube for example.