What if we could merge two or more consecutive posts in a thread (they would be our own posts of course). This would allow for double posts to be deleted (by merging the posts and editing out the duplicate text) and it would also allow people who accidentally post something and then make another post right after it to merge it into one post after they did that.

It could be done so that this could only happen for the last posts in a thread, or you could allow it for posts in the middle of a thread and have the post count read "Post a-b of c" or something like that.

I don't know how feasible this is, but I think it would be a nice option to have and one I would likely make use of fairly often.