bah.
shoes are shoes. they're supposed to be subservient to your feet. besides, it's not like you pay too much for them anyway... (anybody who spends >us$60 on them if they're not doing something sports-related is stupid. there are better ways to flaunt your waste of money.)
i'll admit i don't do it to my wintershoes, either, but that's because i take them off entirely when i don't want to wear them. for sneakers, since they're soft, and the backs aren't really rigid, they can be the mid-way thing. slide on easily, slide off easily.
i usually also have them tied, tight enough that my feet are snug, but loose enough that i can slip in and out of them without much effort.