[Scrambler Bob]

being able to delete a post I have created or edit one to fix an error.
= = =

delete a post - yeah, but only mine. I have spouted off too quickly sometimes.

Edit a post? That might change the whole flow of a thread. If you make some change in a post that has been already replied to, and you may effectively make those replies not apply any more - or even make them wrong.

Cure - be careful. Or make a new reply presenting the edit or change you want to make.

[Myrddin]

Deleting a post should be restricted to the original poster or an admin.

I agree with the concern about how an edited post could destroy the flow. Perhaps allow edits only if there are no later posts that reference it. Getting that right might be as difficult as reference counting objects in C++.