How frequent is the following scenario?
A researcher on an NSF grant posts or publishes a paper which is thematically unrelated to the NSF grant, but acknowledges the grant for financial support. The NSF demands that the acknowledgment be removed.
Is this an extraordinary scenario, or is it considered normal? I have heard different accounts from different people.
Moreover, does this usually cause troubles to the researcher down the line, like extra scrutiny on their next NSF application?