Newsagents should take care with who they permit to access their computer system without their knowledge. I know of at least two newsagency software companies who have access direct into newsagency businesses without the knowledge of the newsagents.
This is a security risk.
You should always know who is accessing your computer system and why. You should not agree to unfettered access as some newsagents accept today.
If someone outside your business can access your computer system and thereby your business data, how can you be sure that your interests are protected. If they need to access this for maintenance reasons then you can let them in each time as you would any guest coming toi your home. This is how my software company Tower Systems operates. I would never want the risk of having unfettered access to a newsagent’s business without their knowledge.
Be careful as I have seen instances over the years where the interests of the newsagents affected were not protected.
So, would you leave your shop unlocked at night? Some newsagents do, sometimes without knowing it.