leaving film leader out

is there any real advantage to leaving the film leader out on 35mm cartridges if i'm having my film processed at a lab? i usually leave mine out, on the assumption that whatever little thingamabob they use to reach up in there and grab the leader poses a slight risk of scratching part of the film containing an image. but doing so slows me down in reloading the camera because i have to fold the leader back around the exposed cartridge and stick the whole thing in a canister, whereas if i just left the leader all the way in the cartridge, i could just stick it in my pocket.

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