If I was a pilot requesting a zone transit VFR and the controller cleared me to transit at 2000ft, I would be very pi$$ed off if a pilot who was operating in the airspace, listening on the frequency knew that it was solid IMC from 1200 to 3000+ and did not report the matter straight away on the frequency.
xyz request cancel IFR. xyz be advised IMC reported in the vicinity of.......
Once again, while there may be an alleged breach of the ANO which would be very hard to proove, there is also a clear admitted case of sitting back and waiting for a VFR pilot to fly into airspace that was known to be IMC and not bothering to warn ATC or the other pilot.
Two sides to every report!!
Regards,
DFC