That is strange, we changed the settings from 15 minutes to 6 hours a couple months back.
Also, please understand that I hear you all and understand the issue. My goal is to develop a solution that will address the abuses that can occur so the limit can be increased. This will be kind of like the way wikis work where old versions of posts are kept in case we need to go back and see if someone is abusing the system.
My 2.5 hour comment apparently is incorrect if you set it to 6 hours. But the time-frame is still a little short. I was thinking of allowing a more liberal amount of time... It is about convenience as much as anything.
The Wiki model might work... but the DB could bloat. Plus, the forum software and its DB would need to be designed to handle it. The software may have limited capabilities in that area.
What is your primary concern? It is to save every bit of information that anyone ever enters or is the concern more around someone deleting all of their posts?
If the types of events you are concerned about are few and far between (like someone deleting all of their posts) and the software and DB require major revisions to enable tracking, it might
not make sense to build in complex features. Since people require an account, they are limited to their personal entries... not broad deletions. This means the system is not render useless... and you have some time to resolve it... (people can continue to use the system). As long as you are taking regular backups you should be able to recover the data removed.
You would need some knowledge and skill... but you might be able to recover cut-throats posts by loading a backup and using basic SQL, if you know the data structure.
There are tools that help to deal with synchronizing data and the data structure itself for that matter. These are DBA and Software Developer tools.
Most of this Open Source software that uses PHP also uses a MYSQL DB. I would assume this is the case here.
Take a look at this. If you ever have a bad event, you should be able to use a tool like this to recover. But again, this would assume you have some technical skills.
Look at this tool.
MySQL GUI Tools, MySQL Monitor and Advisor, MySQL Performance Tuning and Optimization
Webyog FAQ - What is the difference between MySQL server replication and SQLyog synchronization?