Nowadays this is pretty much automatic for a suggestion critic to reply Support or No Support on a suggestion.
When did this happen?
This just seems to be a general response. It's perfectly fine as long as the member provides details on why he/she supports or does not support an idea
Minecraft Forums rules & Information http://www.minecraftforum.net/meta/rules
It started ages ago by I think 0_Zippo or maybe myself. I remember doing it because it summarised the points I had made in the paragraph above.