You mean have a new kind for community posts? That could work, but the drawback I see is that it limits communities from being able to take advantage of all the kinds of notes that already exist. For example, with Satellite I was planning to add the ability to display long-form posts, as well as media (kind 1063) posts. That was why I thought your original idea to just mark any note as a "post request" with an `a` tag was such a good idea.