This web site allows a time limit for people to edit their posts. The default is 60 minutes. In other words, once you have posted, you have an hour to change the posting. In most of the forums, I have set the time limit to 2 days. This would give people sufficient time to edit their posts. The reason is because I felt that once people started responding to a posted message, the posted message should not be changed. Which time limit would you prefer?