Wouldn't that require previewing the thread? I know that a lot of us (like me) are impatient and don't always use the Preview feature. If you screw up, you can always edit, right?
Forcing us to preview or to go through a screen like the one you described would just get to be annoying. Even if it was feasible...please don't do it, Brandon. Think of the Robotics geeks.
(By the way...I'm proud to be a Robotics geek. You should be too.
)
[edit]Whoops...forgot my original post. Oops.[/edit]
In any case, the "Similar Threads" feature is really cool. Especially when nothing else is related to the thread and you get random results.