It would be better than instead of a "me too" comment people could Like or Dislike the original comment
this way the task assignee can see which ideas the community supports and which are crap
I think adding a searchable Token system here would be overkill, just a simple Like and Dislike icon with a counter would suffice - like in Facebook :)
Likes/Dislikes would be Heralded just like a comment was added.