78deg
You asked for an opinion. I would say NO, absolutely not.
If you're desperate just say "mayday"...95% chance we know who you are.
We can confirm after a settling down/stabilisation period.
Let's say your callsign was "Euravia 3465" and you shout "Mayday 1"....what happens if we have in our system....Delta 1...Raffles 1....Speedthing 1....Clipper 1....Laker 1...or anything 1.
The last fam flight I did was on a Danair Comet and the guys wrote the callsign on a big card above the centre console for easy reference......[only remember the flight because they asked me to lean forward a little during descent and chuckled as a stream of water went down my neck].