[EquitableEngineer]

Depending on the store and locality you reside, some self-serve checkouts have an employee standing around offering assistance, so be wary of that when punching In the goods.

I circumvent this completely by using the bigger stores where they have dedicated, unmanned scales in the veg aisle where you can weigh the veg and print out a sticker which has the barcode on it. This way when i get to the self serve all i do is scan it and out it on the scales, the employee manning the self serve area can watch you scan it and not know what just happened.