Hacks that modify base tables are bad, maybe
 

While thinking about the many hacks that add columns to crucial base tables, such as post, it seemed that is not the best idea. Modifying a vBulletin base table could cause problems with upgrades later, or cause corruption, or have unintended side-effects when other hacks add or remove data from them.

It seems that a better way to add data to post, for instance, would be to add a table that holds the new columns. You could just add code that then queries, or adds to, that table using the postid from vBulletin, or modify a query to use a join to bring in the additional data. Like this, perhaps:

This will also add more stress to the server / more querys i think. its much simpler to store the data in the same field