Increasing size integer columns of MySQL

[TSP]

Could you allow us to increase from for example mediumint to int without the database checker complaining/fixing? 

I have a forum where I every time have to manually fix member_posts-column because some member is above the limit of mediumint. 

In my opinion I would say that we should be able to change this, as long as it's change that is able to contain a bigger integer value.