Because most of his songs are either meaningless or hard to find there.
But there are song norms, like My Defense, Zoo is nothing too.
There is such trash such as the Russian field of experiments:
Because the plastic world won
the layout turned out to be stronger
the last boat is cold
the last boat is tired
and lumps are snoring in the throat memories
Well, and because everything is like people have
They have already explained who he is, and why they are joking - probably due to the fact that his songs are very suitable for the group's theme - they are incredibly abstract.
So a generation has grown up ... Yegor Letov is a singer, leader of the Civil Defense group. For the 70-80 generation, he is a symbolic figure; even those who are not enthusiastic about creativity will not deny the scale of Letov and GO.
Why someone jokes about him, I don't know. And to be honest, I haven't met it