Forum Moderators: open
No and yes.
If you have very large JS or CSS files you better keep them offpage for both the bots and to save your bandwith.
Some people believe some SE dislike external JS and CSS files because they could hide potential "tricks". I have no clear indication of this since I have no first hand experience at it. I use external files, leave access open them and get good results.
By the way, when you say, "leave access open" to the files, is there a way to block them for users (so they can't download your code) but leave them free for SE's to see so they don't think you're hiding something??
Try the site search feature, you might get lucky.
<added>jatar_k beat me! 3 am time to go to bed...</added>