Tickmagnet
Without fail you will end up with ideas repeated in that thread and a lot of different suggestions.
I don't think 'like' buttons will cure this. Rather, folks actually reading the discussions would cure it. To me, 'forum' indicates an exchange of ideas. Reading an original post then hitting the reply button and typing a response isn't an exchange of ideas, it is sending a message that nobody else's comments matter.
I'm not saying I don't like your idea, it has merit. But my fear is it would just make the bit about folks not reading threads worse.
Just my 2 cents, I'm not saying I'm right or wrong. I am opining. That's all.