Though I like the idea of a "like" button, I wonder if it would be too easy at times just to click a button without making a post that could potentially be a valuable & educational contribution.
The forum is what it is today with thanks to the people that contributed, so I think hitting "like" could be a lazy way out. Just my thoughts..
And I don't like the "thanks" thing either- it reeks of "look how good I am" and seems competitive. I like that we are a community focussed on contribution and education without the need for all that stuff. Having a decent amount of views or posts on my thread is good enough for me. Again, just my thoughts.