All of a sudden I need to allow cookies on this site to use the edit feature or check to see who left an agree or disagree on a post? Or use the edit button.
Probably because the site software uses cookies to determine when it was that you last visited (more accurately, that the same person has returned). If it doesn't know when you last visited with respect to your current visit, it won't "know" what reactions to your posts you've already viewed. Not sure about editing posts, I think there used to be a time limit on that but it doesn't appear there is now. If there's a time limit, and the cookies are letting the site track the time of your visits/posts, then it could mess up post editing as well.
Most websites nowadays need at least some cookies enabled to function properly. Depending on your web browser you should be able to allow "essential" cookies while still blocking cross-site tracking.
