Inflict away, the "whole world" can deal with it.
It's not so much the people who wish to sing badly in your face who are the problem, but those who've been told they can't sing, and believe it. It's the ones who want to silence them. Ain't gonna happen anyway.

The teachers who tell children for whom they're responsible they "can't sing", are really saying they can't teach.

I started writing a song. I think I should finish it.

Once I had to learn to walk
Then I learned to tie my shoe
And my teachers taught the alphabet
And adding 2 + 2
I didn't know how to do those things
But no one ever said
"You can't do that, so you'll have to go
Outside and play instead"