I've been thinking about this. But stores throw out whole breads when they become too old. And they throw out plenty since people want stores to be stocked all day so there still is bread available at the end of the day. So in a year stores throw out more than you'd throw out if you cut the crusts off.

Since then I don't really care anymore. Somtimes I eat the crusts, other times I cut them off and throw them out. And yes, I know they can still be used for all sorts of things, but none of those are usefull to me.