"Such requests" versus "those requests"

What is the difference between such requests, and these/those requests?

For example, consider these sentences that are taken from a sentence making a list of requests:

Such requests cannot be accepted.

These requests cannot be accepted.

What is the difference between the first and the second sentence?

My interpretation of the difference is that "Such requests cannot be accepted" means "requests such as these", in other words the list of requests given is a representative sample of the sort of request that cannot be accepted.

"These requests cannot be accepted," on the other hand, means that these specific requests are, for some reason, unacceptable.

Such requests means requests of this type. These requests refers to a specific set of requests.