The problem is that if you end the line "down under" it may siphon. It does not hurt anything in the engine bay. You need either leave it there or rebuild it to the old 69 type You can easily get yourself into a situation. You can end up with an unvented tank, a vent that siphons fuel overboard and so on. That line does not weigh much and it does not hurt a thing, and it is necessary.
