Ability to edit a prior post

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I find it helpful that you can edit your own posts after it has been submitted. Some of the time the typos or other types of mistakes just need fixing.

On the other hand there is a limit I would say. On some systems you have 30 minutes or maybe a few days. Of the Motley Fool they do not allow you to edit as it might be legally important the the prior comments stay the way they were presented.

One system had a long term set of discussions going. Then one day a key member got pissed off and systematically deleted all of their prior posts. Folks were shocked at the holes in the past discussions. It was a rather famous event on The Well.

So, how tunable is the system being used here. Can the ability to edit after the fact be adjusted? Assuming it can is there any need for a change from the present?

Just curious. It is the software developer side of me asking.

John Corey