I don't think anyone is claiming it actually is happening. However, they've used MIRCS info to nail dealers for being naughty in the past (e.g. transferring off-roster guns a la Tite Group Sporting) so it's not much of a stretch to assume they'd do the same in this case.
There are already rumors floating around that EOPS/CJIS (or the AGs office? IIRC they have a path into the system now) have already been using it to harass MA dealers (using local PD threatening to suspend licenses as the "stick") doing transfers during this "lockdown". It would be trivially easy for them to set up some kind of a function that shows them any dealer based MIRCS/EFA10 activity. I have not been able to get full verification on the stories I am hearing, though. I do know these tales have caused other dealers to start keeping their heads down out of an abundance of caution.
-Mike