Yes, it is courteous to put the divider down for the person behind you but it isn't your responsibility. It's like holding the door for the person behind you. Again, it is courteous but it isn't your responsibility when it comes down to it.
I don't put my super special grocieries near enough to the other infected groceries to need a little plastic bar.
your procedure is flawed, my friend...
do you think those belts unroll at one end and roll up at the other when theyre finished?? those belt travel in a LOOP!!
you are putting your super special groceries right where all those other peoples infected groceries have been riding all day, there by infecting them by contact... if that doesnt do it the hefalump checking you out has been pawing infected groceries all day before handeling your super special groceries.
heres the way i do it...
i take a dust mask and those disposable rubber gloves to the store. i dont put my groceries on the belt, therefore no need to even deal with the infamous infected grocery spreader bar. when its time for my checkout i hand the checkout person the mask and gloves and announce "i have AIDS and would like to give you my super special groceries and have you scan them 1 at a time and put them in the bag, you can throw the mask and gloves away when we are done"--you would be amazed at how fast they comply with your request, and the person behind you wont even start to put their infected groceries until your gone!!
my super special groceries always come home infection free!!