Moving on from what you showed (thanks much btw, had no grounding in the Reports db) I took what you laid out and made of it a listing of report...

Knowing which was a problem is a job for the @BodyText, this is a variant on something I use (since it looks like you are already using html type)

Maybe the post was unclear. I agreed to not killing, and suggested an email to alert the users that their queries were excessively long duration to help with process improvement....

I like the idea of the wall of shame rather than the kill list. You may want to make it a little closer to home though and have it automatically...