If I understand you correctly ,to participate in this lovely idea we will need to create a post and use the #pob-answers when creating the post ??

yes.

won't it lead to many short posts??

I hadn’t thought about it, now that you’ve said I don’t think the community will like short posts. Although there are other networks like quora, the questions there are small and the answers are big.

In the hive there is a community (Ask the Hive) exactly for that, but nobody of the upvote for those who comment there. That's why 'Ask the Hive' is abandoned.