I doubt you'll ever hear of someone getting a nastygram because it's permitted under the FARs.
There are two published deviations in the ADSB reg. One for when your ADSB is inop and you need to get somewhere to get it repaired. The other is for when ADSB is not installed with no limits or limitations on when, where or how often.
"Per FAA Policy, operators planning flight into ADS-B Out rule airspace using aircraft not equipped with ADS-B Out may use ADAPT to request an authorized deviation provided these flights are for rare, non-routine, non-scheduled events."