Brake and fuel line rubber removal

["steve car" <steve_car@hotmail.com>]

Someone told me you should remove the rubber off the front brake lines 
because moisture could get trapped under it. That makes sense, but shouldn't 
I remove all the rubber end-to-end?
There is rubber on the part that goes from front to back and on the rear 
brake lines. It looks like it would provide some protection. So, which is 
best? Also, the fuel lines have rubber on them along in areas where they go 
through frame holes. Wouldn't the same logic apply to them?
Thank you,
Steve