fuel venting system

i haven't studied the fuel tank and its associated plumbing too keenly but i would like to imagine that i'm a little right in my line of thought regarding brimming your tank. assuming you are on flat ground.. when you full up to the brim (literally), doesn't the fuel follow the vent line (that...

just had a random thought: is brimming your fuel tank unsafe..? after reading a little about the charcoal canister and the general fuel vapor system, and knowing that the fuel inlet is at about the same height as the charcoal canister, i was wondering if any harm can come to the system if the...