Hacking edit-form-advanced.php?

I’m considering doing a hack to edit-form-advanced.php, and am wondering if I might cause unforeseen problems.

In a nutshell, our blog posts will always have titles pulled from a list – there are about 100 different titles for posts, and they will recur over and over again. So rather than type and/or cut-paste them every time, I considered replacing the text field for Post Title with a drop-down selection field.

I think this just involves editing line 146 of edit-form-advanced.php … but by doing so, will I create any issues elsewhere?