Yeah you're right other than emissions there is no reason for it... If you block off all the lines you can direct vent the PVC also. Lucky you do't have a catalytic on that puppy it takes time to pull the guts out of them. I have a drum of methyl lead of you need some for your gas.
Not to defend someone who wants to pollute, but the reason may be to clean up the engine compartment. You have to admit, that cannister is not the most attractive component under our hoods. Before you flame, I still have mine
Good points. Most emmision equipment is designed to make the engine more efficient. In most cases, this means less wasting of fuel, or cleaner exhaust. The cases where emmisions goes up against performance are harder to defend.