I don't see a like button or a rating system being necessary, or beneficial at all. What I post isn't always popular, but it's my opinion. As long as I'm not out of line I could frankly care less if someone likes it, or wants to give me a 1 star or 5 stars.
I think it actually runs the risk of creating more issues, and drama. Someone makes a negative post about a board member, or a cigar manufacturer and it gets 15 likes, that person gets even more offended that other people agree with the posters opinion, they feel the need to repond, then 10 people like their response, and it just keeps fueling the fire. I have a "like" button in my head. If I read something and like it, I think "hey, that's a good point/comment/info." For example, anytime Clint posts something I think "geez, what an idiot." I hope there isn't anyone here so in need of acceptance that they are looking at a like count or a star rating for justification.