Do we really have to edit the text of the whole page?
Yes, that's the wiki way ... to edit common pages. It may feel unusual at first, when being used to forums with their threads and strict separation of messages. But in the wiki you can add your texts, ideas or contributions anywhere. You can refine your own ideas from last month, or add questions, comments or answer in between the text of other members. You can also correct spelling mistakes or fix broken links if you feel so. You will also delete messages from your own homepage when they have served their purpose. Sometimes it's like writing a book together, sometimes it feels like housekeeping.