I think you're bonkers. Stretching tyres is not something I would do, especially in an extreme way as it sounds like you're doing. Call me old-fashioned but I would rather have a tyre used in the way it's supposed to be and feel safe than put mine and others' well-being at risk just because it "looks good".
Tyres are your only point of contact with the road. I'd prefer that I have confidence in them.