I have recently thought of doing something like this, but I didn't think of the tag. Honestly I don't think the tag has to be there. It is good to promote the idea itself, though.

My friend @dkrmarcos posted a review about this one anime. So I posted my "first impressions" of the same anime in my portuguese account @posthero after watching the first episode. It is my plan to keep doing this sort of thing, but with more people involved, of course.

It's like circlejerking post ideas instead of upvotes. Or, well, both.