A search did not provide anything on the -12. I wasn't going to assume what happens to a -7 is the same.
I am only interested in the RV-12 and its tendencies with the canopy unlatched in flight. Every aircraft is different so what may be deadly to a -7 or a -3 may be a complete non issue to a different model.
You are exactly on point with the reason, I used to react badly to insect stings when I was younger. I don't know now and am not looking to find out. I also don't want to be a test pilot by cracking opening the canopy.
Live as if you were to die tomorrow. Learn as if you were to live forever.
-- Walt --