Dear Avira,
No google. Just my memory. Did you look up the gemara? It doesn’t mention any chutzpa. I don’t know what you make of the upper realms, but I doubt that there is a need to maintain any decorum. It’s something of an existential condition. It’s nothing to do with the way to act.
A person believes what is in their head. How it looks to you or me, is not of consequence. “It shows that he believes in the power of something besides Hashem” is the bludgeon of Jihadists and Crusaders. Hashem Knows and is not fooled by any shows. The laws of A”Z are clearly spelled out. Beseeching a human, dead or alive; is not addressed.
And to get to the main topic. What is the difference if the body is dead or alive? The neshoma is unchanged, because it is eternal. (At least according to the Kabbalistic Gospel of Chabad. Which is older than Lubavitch itself.) The tzaddik helps you from the depth of his neshoma, so if you can ask him when his body is holding his soul, the same should apply after they seperate. I don’t know your answer on this.
[I see I missed your post about why schism is necessary in Judaism. Not all those schisms were intentional. And nowhere do chazal tell us they were needed. The justification for schism is recorded in other religion’s writings. Our seforim ignore the topic.]