you did the right thing, i along with a few already posted on here drive emergency vehicles and so far including me, when asked NONE of us would throw our car up a kerb.
re: red lights, emergency vehicles SHOULD turn off sirens as it can account to bullying and harassing and some people take undue risks and consequently drive through red lights….. the sirens go off with lights still on and if a driver chooses to drive through, its their decision and fault if something happens.
the unfortunate reality is from personal experience, most ambulance personnel would indeed be embarrassed to tell you what we end up going out to in an “emergency” and you can tend to tell, from my locale anyway when its a REAL emergency as the ambulances tend to be pretty blatant if they are in a hurry! you do get some dickheads driving them but generally we are going to nan downs and drunks down 3/4 of the time, and when its a proper poorly youll know! lol
i digress, you did the right thing, screw the abuse!