My take: explicitly means clearly and without any vagueness or ambiguity.

It doesn't mean "to say something ..."

So..."if it becomes clear without vagueness or ambiguity that the user is ..."

I don't think it's about preventing such requests only if the request is clear. It's about being certain about what is being requested before censoring. Also, "explicitly clear" is redundant. Wording might be improved with "unambiguously" rather than "explicitly".