I disagree with the ability to delete your own posts.
I have many precious moments of some of the dumbest crap I have ever said.
It’s good for reflection.
:^)
Well I post via Disqus on some news blogs and it has that capability to edit such as clarifying or deleting posts you’ve found out were erroneous like I’ve done here several times without vetting the story beforehand. They also have a voting capability.