well depending on the service you are not allowed to halt that service for various reasons - for example you can't halt or refuse to provide service in just about anything for reasons of race in countries whose legal systems I am familiar with, therefore there is some requirement to provide a reasonable explanation for refusal of service in almost any business - it just so happens that an app store type business seems different enough that it does not have to provide the same level of explanation.
No, I was replying specifically to the parent comment that said it was a terrible idea that a reasonable explanation be provided. Although, depending on the relevant legal system, just specifying fraudulent conduct without providing a lot more detail would be in itself problematic.
