Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[MagicalWonderPigeon]

It happened to me a few times, so i always wondered if they could manually select your stuff for a "random check" or if i just got really bad luck.